Q: Is 720,320 a Prime Number?
A: No, 720,320 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 720320 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 64 80 160 320 2,251 4,502 9,004 11,255 18,008 22,510 36,016 45,020 72,032 90,040 144,064 180,080 360,160 and 720,320, with no remainder.
Since 720,320 cannot be divided by just 1 and 720,320, it is not a prime number.