500
Define all the divisibility rules!!
You know a number is divisible by:
2 if it ends with an even number (0, 2, 4, 6, 8)
3 if all the digits add up to a number divisible by 3
6 if the number is divisible by 2 and 3
5 if the number ends in a 5 or 0
10 if the number ends in a 0
4 if the last two digits (in the ones and tens place) are divisible by 4