Q: Is 391,230 a Composite Number?

Why is 391,230 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 391,230 can be evenly divided by 1 2 3 5 6 7 9 10 14 15 18 21 23 27 30 35 42 45 46 54 63 69 70 81 90 105 115 126 135 138 161 162 189 207 210 230 243 270 315 322 345 378 405 414 483 486 567 621 630 690 805 810 945 966 1,035 1,134 1,215 1,242 1,449 1,610 1,701 1,863 1,890 2,070 2,415 2,430 2,835 2,898 3,105 3,402 3,726 4,347 4,830 5,589 5,670 6,210 7,245 8,505 8,694 9,315 11,178 13,041 14,490 17,010 18,630 21,735 26,082 27,945 39,123 43,470 55,890 65,205 78,246 130,410 195,615 and 391,230, with no remainder.

Since 391,230 cannot be divided by just 1 and 391,230, 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).