Q: Is 309,428 a Prime Number?
A: No, 309,428 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 309428 can be evenly divided by 1 2 4 7 14 28 43 86 172 257 301 514 602 1,028 1,204 1,799 3,598 7,196 11,051 22,102 44,204 77,357 154,714 and 309,428, with no remainder.
Since 309,428 cannot be divided by just 1 and 309,428, it is not a prime number.