Q: Is 400,428 a Prime Number?
A: No, 400,428 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 400428 can be evenly divided by 1 2 3 4 6 7 9 12 14 18 21 28 36 42 49 63 84 98 126 147 196 227 252 294 441 454 588 681 882 908 1,362 1,589 1,764 2,043 2,724 3,178 4,086 4,767 6,356 8,172 9,534 11,123 14,301 19,068 22,246 28,602 33,369 44,492 57,204 66,738 100,107 133,476 200,214 and 400,428, with no remainder.
Since 400,428 cannot be divided by just 1 and 400,428, it is not a prime number.