diff --git a/homeassistant/components/baf/number.py b/homeassistant/components/baf/number.py
index 91fe110d388..020f34fefaf 100644
--- a/homeassistant/components/baf/number.py
+++ b/homeassistant/components/baf/number.py
@@ -27,7 +27,6 @@ class BAFNumberDescriptionMixin:
     """Required values for BAF sensors."""
 
     value_fn: Callable[[Device], int | None]
-    mode: NumberMode
 
 
 @dataclass
@@ -147,7 +146,6 @@ class BAFNumber(BAFEntity, NumberEntity):
         self.entity_description = description
         super().__init__(device, f"{device.name} {description.name}")
         self._attr_unique_id = f"{self._device.mac_address}-{description.key}"
-        self._attr_mode = description.mode
 
     @callback
     def _async_update_attrs(self) -> None:
diff --git a/homeassistant/components/bmw_connected_drive/number.py b/homeassistant/components/bmw_connected_drive/number.py
index f26a2027f72..820257f6163 100644
--- a/homeassistant/components/bmw_connected_drive/number.py
+++ b/homeassistant/components/bmw_connected_drive/number.py
@@ -40,7 +40,6 @@ class BMWNumberEntityDescription(NumberEntityDescription, BMWRequiredKeysMixin):
 
     is_available: Callable[[MyBMWVehicle], bool] = lambda _: False
     dynamic_options: Callable[[MyBMWVehicle], list[str]] | None = None
-    mode: NumberMode = NumberMode.AUTO
 
 
 NUMBER_TYPES: list[BMWNumberEntityDescription] = [
@@ -99,7 +98,6 @@ class BMWNumber(BMWBaseEntity, NumberEntity):
         super().__init__(coordinator, vehicle)
         self.entity_description = description
         self._attr_unique_id = f"{vehicle.vin}-{description.key}"
-        self._attr_mode = description.mode
 
     @property
     def native_value(self) -> float | None:
diff --git a/homeassistant/components/number/__init__.py b/homeassistant/components/number/__init__.py
index e090a21a23e..2ad63c75e04 100644
--- a/homeassistant/components/number/__init__.py
+++ b/homeassistant/components/number/__init__.py
@@ -127,10 +127,11 @@ class NumberEntityDescription(EntityDescription):
     device_class: NumberDeviceClass | None = None
     max_value: None = None
     min_value: None = None
+    mode: NumberMode | None = None
     native_max_value: float | None = None
     native_min_value: float | None = None
-    native_unit_of_measurement: str | None = None
     native_step: float | None = None
+    native_unit_of_measurement: str | None = None
     step: None = None
     unit_of_measurement: None = None  # Type override, use native_unit_of_measurement
 
@@ -193,7 +194,7 @@ class NumberEntity(Entity):
     _attr_device_class: NumberDeviceClass | None
     _attr_max_value: None
     _attr_min_value: None
-    _attr_mode: NumberMode = NumberMode.AUTO
+    _attr_mode: NumberMode
     _attr_state: None = None
     _attr_step: None
     _attr_unit_of_measurement: None  # Subclasses of NumberEntity should not set this
@@ -201,8 +202,8 @@ class NumberEntity(Entity):
     _attr_native_max_value: float
     _attr_native_min_value: float
     _attr_native_step: float
-    _attr_native_value: float | None = None
     _attr_native_unit_of_measurement: str | None
+    _attr_native_value: float | None = None
     _deprecated_number_entity_reported = False
     _number_option_unit_of_measurement: str | None = None
 
@@ -357,7 +358,14 @@ class NumberEntity(Entity):
     @property
     def mode(self) -> NumberMode:
         """Return the mode of the entity."""
-        return self._attr_mode
+        if hasattr(self, "_attr_mode"):
+            return self._attr_mode
+        if (
+            hasattr(self, "entity_description")
+            and self.entity_description.mode is not None
+        ):
+            return self.entity_description.mode
+        return NumberMode.AUTO
 
     @property
     @final
diff --git a/homeassistant/components/shelly/number.py b/homeassistant/components/shelly/number.py
index 5a00a1df0dd..fb95a180e76 100644
--- a/homeassistant/components/shelly/number.py
+++ b/homeassistant/components/shelly/number.py
@@ -30,7 +30,6 @@ from .entity import (
 class BlockNumberDescription(BlockEntityDescription, NumberEntityDescription):
     """Class to describe a BLOCK sensor."""
 
-    mode: NumberMode = NumberMode("slider")
     rest_path: str = ""
     rest_arg: str = ""
 
@@ -46,7 +45,7 @@ NUMBERS: Final = {
         native_min_value=0,
         native_max_value=100,
         native_step=1,
-        mode=NumberMode("slider"),
+        mode=NumberMode.SLIDER,
         rest_path="thermostat/0",
         rest_arg="pos",
     ),