Is 9 a factor of 4788?

To determine if 9 is a factor of 4788, we need to check if 4788 is divisible by 9 without any remainder. We can do this by adding the digits of 4788 together: 4+7+8+8 = 27. Since 27 is divisible by 9, we can conclude that 4788 is also divisible by 9. Therefore, 9 is a factor of 4788.