Which is the largest four-digit number that has all four of its digits among its divisors and its digits are all different?
Problem
Source: (2022-) 2023 XVI 16th Dürer Math Competition Finals Day 2 E3
Tags: number theory, Digits
Source: (2022-) 2023 XVI 16th Dürer Math Competition Finals Day 2 E3
Tags: number theory, Digits
Which is the largest four-digit number that has all four of its digits among its divisors and its digits are all different?