Q: Is 670,428 a Prime Number?
A: No, 670,428 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 670428 can be evenly divided by 1 2 3 4 6 9 11 12 18 22 33 36 44 66 99 132 198 396 1,693 3,386 5,079 6,772 10,158 15,237 18,623 20,316 30,474 37,246 55,869 60,948 74,492 111,738 167,607 223,476 335,214 and 670,428, with no remainder.
Since 670,428 cannot be divided by just 1 and 670,428, it is not a prime number.