Q: Is 840,428 a Prime Number?
A: No, 840,428 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 840428 can be evenly divided by 1 2 4 163 326 652 1,289 2,578 5,156 210,107 420,214 and 840,428, with no remainder.
Since 840,428 cannot be divided by just 1 and 840,428, it is not a prime number.