Q: Is 218,428 a Prime Number?
A: No, 218,428 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 218428 can be evenly divided by 1 2 4 7 14 28 29 58 116 203 269 406 538 812 1,076 1,883 3,766 7,532 7,801 15,602 31,204 54,607 109,214 and 218,428, with no remainder.
Since 218,428 cannot be divided by just 1 and 218,428, it is not a prime number.