That is, the last digit is 0, 2, 4, 6, or 8. (We then say the number is an even number.) For example, in the number 236, the last digit is 6. Although 522 is divisible by 2 (the last digit is even) an...That is, the last digit is 0, 2, 4, 6, or 8. (We then say the number is an even number.) For example, in the number 236, the last digit is 6. Although 522 is divisible by 2 (the last digit is even) and 3 (5+2+2=9, which is a multiple of 3), it is also divisible by 6 and 9. One way to find the prime factorization of a number is to begin with the prime numbers 2, 3, 5, 7, 11 and so on, and determine whether the number is divisible by the primes.