Q: Is 4,000,398 a Prime Number?
A: No, 4,000,398 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 4000398 can be evenly divided by 1 2 3 6 666,733 1,333,466 2,000,199 and 4,000,398, with no remainder.
Since 4,000,398 cannot be divided by just 1 and 4,000,398, it is not a prime number.