55979904 has 64 divisors (see below), whose sum is σ = 150809040. Its totient is φ = 18395136.

The previous prime is 55979899. The next prime is 55979933. The reversal of 55979904 is 40997955.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27034 + ... + 29030.

Almost surely, 2^55979904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55979904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75404520).

55979904 is an abundant number, since it is smaller than the sum of its proper divisors (94829136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55979904 is a wasteful number, since it uses less digits than its factorization.

55979904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087 (or 2075 counting only the distinct ones).

The product of its (nonzero) digits is 510300, while the sum is 48.

The square root of 55979904 is about 7481.9719325857. The cubic root of 55979904 is about 382.5404664778.

The spelling of 55979904 in words is "fifty-five million, nine hundred seventy-nine thousand, nine hundred four".