The toner, developer, developing apparatus and an image forming apparatus

The present invention provides the fluidity, chargeability and fixability improving toner, developer, developing apparatus and an image forming apparatus. The toner comprising the core particle surface is formed a shell of the toner particles and the external additive (1) is formed in the shell of the core particle surface film, (2) a shape factor SF-2 of 120 or more, 140 or less, ( . 3) as measured by the BET BET specific surface area of ​​1.2m2 / cm3 or more, 4.0m2 / cm3 or less. The developer containing the toner is filled in the developing apparatus of the image forming apparatus, an image is formed.