Q: Is 646,380 a Composite Number?

Why is 646,380 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 646,380 can be evenly divided by 1 2 3 4 5 6 7 9 10 12 14 15 18 19 20 21 27 28 30 35 36 38 42 45 54 57 60 63 70 76 81 84 90 95 105 108 114 126 133 135 140 162 171 180 189 190 210 228 243 252 266 270 285 315 324 342 378 380 399 405 420 486 513 532 540 567 570 630 665 684 756 798 810 855 945 972 1,026 1,134 1,140 1,197 1,215 1,260 1,330 1,539 1,596 1,620 1,701 1,710 1,890 1,995 2,052 2,268 2,394 2,430 2,565 2,660 2,835 3,078 3,402 3,420 3,591 3,780 3,990 4,617 4,788 4,860 5,130 5,670 5,985 6,156 6,804 7,182 7,695 7,980 8,505 9,234 10,260 10,773 11,340 11,970 14,364 15,390 17,010 17,955 18,468 21,546 23,085 23,940 30,780 32,319 34,020 35,910 43,092 46,170 53,865 64,638 71,820 92,340 107,730 129,276 161,595 215,460 323,190 and 646,380, with no remainder.

Since 646,380 cannot be divided by just 1 and 646,380, 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).