Q: Is 638,080 a Prime Number?
A: No, 638,080 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 638080 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 64 80 128 160 320 640 997 1,994 3,988 4,985 7,976 9,970 15,952 19,940 31,904 39,880 63,808 79,760 127,616 159,520 319,040 and 638,080, with no remainder.
Since 638,080 cannot be divided by just 1 and 638,080, it is not a prime number.