Q: Is 6,400,428 a Prime Number?
A: No, 6,400,428 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 6400428 can be evenly divided by 1 2 3 4 6 12 41 82 123 164 246 492 13,009 26,018 39,027 52,036 78,054 156,108 533,369 1,066,738 1,600,107 2,133,476 3,200,214 and 6,400,428, with no remainder.
Since 6,400,428 cannot be divided by just 1 and 6,400,428, it is not a prime number.