Q: Is 420,421,428 a Composite Number?

Why is 420,421,428 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 420,421,428 can be evenly divided by 1 2 3 4 6 7 9 12 14 18 21 27 28 36 42 54 63 81 84 108 126 162 189 252 324 378 567 756 1,134 2,268 185,371 370,742 556,113 741,484 1,112,226 1,297,597 1,668,339 2,224,452 2,595,194 3,336,678 3,892,791 5,005,017 5,190,388 6,673,356 7,785,582 10,010,034 11,678,373 15,015,051 15,571,164 20,020,068 23,356,746 30,030,102 35,035,119 46,713,492 60,060,204 70,070,238 105,105,357 140,140,476 210,210,714 and 420,421,428, with no remainder.

Since 420,421,428 cannot be divided by just 1 and 420,421,428, 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).