Q: Is 409,640 a Composite Number?

Why is 409,640 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 409,640 can be evenly divided by 1 2 4 5 7 8 10 11 14 19 20 22 28 35 38 40 44 49 55 56 70 76 77 88 95 98 110 133 140 152 154 190 196 209 220 245 266 280 308 380 385 392 418 440 490 532 539 616 665 760 770 836 931 980 1,045 1,064 1,078 1,330 1,463 1,540 1,672 1,862 1,960 2,090 2,156 2,660 2,695 2,926 3,080 3,724 4,180 4,312 4,655 5,320 5,390 5,852 7,315 7,448 8,360 9,310 10,241 10,780 11,704 14,630 18,620 20,482 21,560 29,260 37,240 40,964 51,205 58,520 81,928 102,410 204,820 and 409,640, with no remainder.

Since 409,640 cannot be divided by just 1 and 409,640, 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).