Q: Is 518,728 a Prime Number?
A: No, 518,728 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 518728 can be evenly divided by 1 2 4 7 8 14 28 56 59 118 157 236 314 413 472 628 826 1,099 1,256 1,652 2,198 3,304 4,396 8,792 9,263 18,526 37,052 64,841 74,104 129,682 259,364 and 518,728, with no remainder.
Since 518,728 cannot be divided by just 1 and 518,728, it is not a prime number.