3804 is an esthetic number in base 16, 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).
It is a plaindrome in base 14.
It is a nialpdrome in base 16.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 3804.
23804 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.
3804 is a wasteful number, since it uses less digits than its factorization.
3804 is an evil number, because the sum of its binary digits is even.
The square root of 3804 is about 61.6765757804. The cubic root of 3804 is about 15.6103809931.
Adding to 3804 its reverse (4083), we get a palindrome (7887).
The spelling of 3804 in words is "three thousand, eight hundred four".