Q: Is 1,809,780 a Composite Number?

Why is 1,809,780 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 1,809,780 can be evenly divided by 1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 31 35 42 60 62 70 84 93 105 124 139 140 155 186 210 217 278 310 372 417 420 434 465 556 620 651 695 834 868 930 973 1,085 1,302 1,390 1,668 1,860 1,946 2,085 2,170 2,604 2,780 2,919 3,255 3,892 4,170 4,309 4,340 4,865 5,838 6,510 8,340 8,618 9,730 11,676 12,927 13,020 14,595 17,236 19,460 21,545 25,854 29,190 30,163 43,090 51,708 58,380 60,326 64,635 86,180 90,489 120,652 129,270 150,815 180,978 258,540 301,630 361,956 452,445 603,260 904,890 and 1,809,780, with no remainder.

Since 1,809,780 cannot be divided by just 1 and 1,809,780, 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).