Divisor 28503

To determine if any number is divisible by 28503, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 9 and 3167 - then it is divisible by 28503.

The following tests must pass:

• Test if a number is divisible by 9
• The "Michael Mayfield Test" for Divisibility by 3167

Easy!