Is 478 a Prime Number?

To determine whether the number 478 is a prime number, it is necessary to check if it has any divisors besides 1 and itself. This involves checking if there are any other numbers that can divide 478 evenly, meaning without leaving a remainder. If such divisors exist, 478 is not a prime number; otherwise, it would be classified as prime.

To quickly check if 478 is a prime number:

Calculate the square root of 478

$\sqrt{478} = 21.86$

Prime numbers less than or equal to 21.86: 2, 3, 5, 7, 11, 13, 17, 19

• 478 is divisible by number: 2, 239.

Since 478 is divisible by a number 2, 239 other than 1 and itself, so it is not a prime number