Q: Is 780,780 a Composite Number?

Why is 780,780 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 780,780 can be evenly divided by 1 2 3 4 5 6 7 10 11 12 13 14 15 20 21 22 26 28 30 33 35 39 42 44 52 55 60 65 66 70 77 78 84 91 105 110 130 132 140 143 154 156 165 169 182 195 210 220 231 260 273 286 308 330 338 364 385 390 420 429 455 462 507 546 572 660 676 715 770 780 845 858 910 924 1,001 1,014 1,092 1,155 1,183 1,365 1,430 1,540 1,690 1,716 1,820 1,859 2,002 2,028 2,145 2,310 2,366 2,535 2,730 2,860 3,003 3,380 3,549 3,718 4,004 4,290 4,620 4,732 5,005 5,070 5,460 5,577 5,915 6,006 7,098 7,436 8,580 9,295 10,010 10,140 11,154 11,830 12,012 13,013 14,196 15,015 17,745 18,590 20,020 22,308 23,660 26,026 27,885 30,030 35,490 37,180 39,039 52,052 55,770 60,060 65,065 70,980 78,078 111,540 130,130 156,156 195,195 260,260 390,390 and 780,780, with no remainder.

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