Divisor 28857

To determine if any number is divisible by 28857, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 9619 - then it is divisible by 28857.

The following tests must pass:

• Test if a number is divisible by 3
• The "David Johnston Test" for Divisibility by 9619

Easy!