I actually have no clue offhand what my phone number is. They gave it to me, I forwarded it to the 'important' people in my life, and promptly started a Google Voice number for everyone else.
GV allows you to choose the number you want, so, while I wouldn't say it's cool, it is incredibly easy to remember which is nice (not to mention the ability to block calls and set 'quiet times'... features my previous phones have have, but Apple refuses to implement).