Who called from 3867569530

I'm getting phone calls from this number on my cell phone!  They never leave a message.  
Very annoying!

they keep calling me.they will not stop

Jerks are calling from this number all the time.  What do we do?  How do we get them to stop?  I have a prepaid phone.  I've only had it as a secondary phone for a few weeks...how in the world did they get the number?

they called me 6 times in the past 3 days and i dont know how they even got my number

I've receive 3 calls since yesterday and no message.  I don't know or even what area code it is.