Font Number Conversion?

[Scott Rossi]

Hi All:

I'm struggling to to do some converting of Unicode icon font characters
and am lost in number formats and representations.  For example, a
character can be represented in these forms:
Decimal: 58880
Unicode: E600
HTML: 
CSS: \f230

Does anyone know how the CSS number is derived?  I've tried all manner of
baseConvert, codepointToNum, etc, and the only result I've been able to
achieve is a headache.

I'm sure this is pretty straightforward but I'm not a numbers guy.  Thanks
in advance for any numerical enlightenment.

Regards,

Scott Rossi
Creative Director
Tactile Media, UX/UI Design