Q: Is 720,728 a Prime Number?
A: No, 720,728 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 720728 can be evenly divided by 1 2 4 8 23 46 92 184 3,917 7,834 15,668 31,336 90,091 180,182 360,364 and 720,728, with no remainder.
Since 720,728 cannot be divided by just 1 and 720,728, it is not a prime number.