Divisor 28989

To determine if any number is divisible by 28989, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 9 and 3221 - then it is divisible by 28989.

The following tests must pass:

• Test if a number is divisible by 9
• The "Leonardo Bishop Test" for Divisibility by 3221

Easy!