Q: Is 78,320 a Prime Number?
A: No, 78,320 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 78320 can be evenly divided by 1 2 4 5 8 10 11 16 20 22 40 44 55 80 88 89 110 176 178 220 356 440 445 712 880 890 979 1,424 1,780 1,958 3,560 3,916 4,895 7,120 7,832 9,790 15,664 19,580 39,160 and 78,320, with no remainder.
Since 78,320 cannot be divided by just 1 and 78,320, it is not a prime number.