Subtracting from 3684 its sum of digits (21), we obtain a palindrome (3663).
3684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
3684 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.
It is a tau number, because it is divible by the number of its divisors (12).
3684 is a repfigit number.
It is a plaindrome in base 15.
It is a nialpdrome in base 16.
It is a self number, because there is not a number n which added to its sum of digits gives 3684.
It is an unprimeable number.
3684 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
23684 is an apocalyptic number.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
3684 is a wasteful number, since it uses less digits than its factorization.
3684 is an evil number, because the sum of its binary digits is even.
The square root of 3684 is about 60.6959636220. The cubic root of 3684 is about 15.4444770322. Note that the first 4 decimals are identical.
The spelling of 3684 in words is "three thousand, six hundred eighty-four".