Who called from 3604613752

Just called me no answer  hung up

called me no message left and I did not try to call back

I got a call from this number too - didn't leave a message.

did not leave message. 2nd time

Just got called on my Droid Razr and there was a recording saying that I won something and all I have to do is press 1 and answer some questions to claim my prize, I didnt press 1 and just stayed on till they hang up!!
How the hell do they get my number if I dont give it out to no one!!! I think Verizon is leaking phone #'s out to make more money!!!