Q: Is 309,640 a Prime Number?
A: No, 309,640 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 309640 can be evenly divided by 1 2 4 5 8 10 20 40 7,741 15,482 30,964 38,705 61,928 77,410 154,820 and 309,640, with no remainder.
Since 309,640 cannot be divided by just 1 and 309,640, it is not a prime number.