Q: Is 1,389,728 a Prime Number?
A: No, 1,389,728 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 1389728 can be evenly divided by 1 2 4 8 16 32 137 274 317 548 634 1,096 1,268 2,192 2,536 4,384 5,072 10,144 43,429 86,858 173,716 347,432 694,864 and 1,389,728, with no remainder.
Since 1,389,728 cannot be divided by just 1 and 1,389,728, it is not a prime number.