55904 has 12 divisors (see below), whose sum is σ = 110124. Its totient is φ = 27936.

The previous prime is 55903. The next prime is 55921. The reversal of 55904 is 40955.

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 55904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842 + ... + 905.

It is an arithmetic number, because the mean of its divisors is an integer number (9177).

2⁵⁵⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

55904 is a deficient number, since it is larger than the sum of its proper divisors (54220).

55904 is a wasteful number, since it uses less digits than its factorization.

55904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757 (or 1749 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 55904 is about 236.4402672981. The cubic root of 55904 is about 38.2367490803.

It can be divided in two parts, 55 and 904, that added together give a palindrome (959).

The spelling of 55904 in words is "fifty-five thousand, nine hundred four".