Q: Is 509,840 a Prime Number?
A: No, 509,840 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 509840 can be evenly divided by 1 2 4 5 8 10 16 20 40 80 6,373 12,746 25,492 31,865 50,984 63,730 101,968 127,460 254,920 and 509,840, with no remainder.
Since 509,840 cannot be divided by just 1 and 509,840, it is not a prime number.