Q: Is 378,420 a Composite Number?

Why is 378,420 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 378,420 can be evenly divided by 1 2 3 4 5 6 7 10 12 14 15 17 20 21 28 30 34 35 42 51 53 60 68 70 84 85 102 105 106 119 140 159 170 204 210 212 238 255 265 318 340 357 371 420 476 510 530 595 636 714 742 795 901 1,020 1,060 1,113 1,190 1,428 1,484 1,590 1,785 1,802 1,855 2,226 2,380 2,703 3,180 3,570 3,604 3,710 4,452 4,505 5,406 5,565 6,307 7,140 7,420 9,010 10,812 11,130 12,614 13,515 18,020 18,921 22,260 25,228 27,030 31,535 37,842 54,060 63,070 75,684 94,605 126,140 189,210 and 378,420, with no remainder.

Since 378,420 cannot be divided by just 1 and 378,420, it is a composite number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).