Q: Is 1,789,780 a Prime Number?
A: No, 1,789,780 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 1789780 can be evenly divided by 1 2 4 5 10 20 109 218 436 545 821 1,090 1,642 2,180 3,284 4,105 8,210 16,420 89,489 178,978 357,956 447,445 894,890 and 1,789,780, with no remainder.
Since 1,789,780 cannot be divided by just 1 and 1,789,780, it is not a prime number.