Q: Is 393,428 a Prime Number?
A: No, 393,428 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 393428 can be evenly divided by 1 2 4 7 14 28 14,051 28,102 56,204 98,357 196,714 and 393,428, with no remainder.
Since 393,428 cannot be divided by just 1 and 393,428, it is not a prime number.