Is 390 a Prime Number?

To determine whether the number 390 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 390 evenly, meaning without leaving a remainder. If such divisors exist, 390 is not a prime number; otherwise, it would be classified as prime.

To quickly check if 390 is a prime number:

Calculate the square root of 390

$\sqrt{390} = 19.75$

Prime numbers less than or equal to 19.75: 2, 3, 5, 7, 11, 13, 17, 19

• 390 is divisible by number: 2, 3, 5, 13.

Since 390 is divisible by a number 2, 3, 5, 13 other than 1 and itself, so it is not a prime number