Divisor 28777

To determine if any number is divisible by 28777, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 7 and 4111 - then it is divisible by 28777.

The following tests must pass:

• Test if a number is divisible by 7
• The "Connor Schleicher Test" for Divisibility by 4111

Easy!