To the "Nefarious Ned"

I don't remember the math to it, all I remember is the solution, as I have seen similar problems, but without the setup.

6210001000

You have to have a number that returns itself, and the result of the number you put in is a tally of the number of times the digits appear in the number. So if you put in 6210001000, there are 6 zeros, 2 ones, 0 threes, 0 fours, 0 fives, 1 six, 0 sevens, 0 eights, and 0 nines. So the computer will return the same number -- 6210001000.

If I can remember how I did the math, I'll post it.