Q: Is 40 a Prime Number?
A: No, 40 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 40 can be evenly divided by 1 2 4 5 8 10 20 and 40, with no remainder.
Since 40 cannot be divided by just 1 and 40, it is not a prime number.