Q: Is 72,840 a Prime Number?
A: No, 72,840 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 72840 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 20 24 30 40 60 120 607 1,214 1,821 2,428 3,035 3,642 4,856 6,070 7,284 9,105 12,140 14,568 18,210 24,280 36,420 and 72,840, with no remainder.
Since 72,840 cannot be divided by just 1 and 72,840, it is not a prime number.