Q: Is 287,640 a Composite Number?

Why is 287,640 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 287,640 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 17 18 20 24 30 34 36 40 45 47 51 60 68 72 85 90 94 102 120 136 141 153 170 180 188 204 235 255 282 306 340 360 376 408 423 470 510 564 612 680 705 765 799 846 940 1,020 1,128 1,224 1,410 1,530 1,598 1,692 1,880 2,040 2,115 2,397 2,820 3,060 3,196 3,384 3,995 4,230 4,794 5,640 6,120 6,392 7,191 7,990 8,460 9,588 11,985 14,382 15,980 16,920 19,176 23,970 28,764 31,960 35,955 47,940 57,528 71,910 95,880 143,820 and 287,640, with no remainder.

Since 287,640 cannot be divided by just 1 and 287,640, 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).