Q: Is 640,008 a Prime Number?
A: No, 640,008 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 640008 can be evenly divided by 1 2 3 4 6 8 9 12 18 24 27 36 54 72 108 216 2,963 5,926 8,889 11,852 17,778 23,704 26,667 35,556 53,334 71,112 80,001 106,668 160,002 213,336 320,004 and 640,008, with no remainder.
Since 640,008 cannot be divided by just 1 and 640,008, it is not a prime number.