Divisor 28781

To determine if any number is divisible by 28781, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 17 and 1693 - then it is divisible by 28781.

The following tests must pass:

• Test if a number is divisible by 17
• The "Matthew Burket Test" for Divisibility by 1693

Easy!