Q: Is 3,221,628 a Prime Number?
A: No, 3,221,628 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 3221628 can be evenly divided by 1 2 3 4 6 12 67 134 201 268 402 804 4,007 8,014 12,021 16,028 24,042 48,084 268,469 536,938 805,407 1,073,876 1,610,814 and 3,221,628, with no remainder.
Since 3,221,628 cannot be divided by just 1 and 3,221,628, it is not a prime number.