Q: Is 780,428 a Prime Number?
A: No, 780,428 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 780428 can be evenly divided by 1 2 4 11 22 44 17,737 35,474 70,948 195,107 390,214 and 780,428, with no remainder.
Since 780,428 cannot be divided by just 1 and 780,428, it is not a prime number.