55591904 has 24 divisors (see below), whose sum is σ = 115885728. Its totient is φ = 26160640.

The previous prime is 55591901. The next prime is 55591919. The reversal of 55591904 is 40919555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55591901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50552 + ... + 51639.

It is an arithmetic number, because the mean of its divisors is an integer number (4828572).

Almost surely, 2^55591904 is an apocalyptic number.

It is an amenable number.

55591904 is an abundant number, since it is smaller than the sum of its proper divisors (60293824).

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

55591904 is a wasteful number, since it uses less digits than its factorization.

55591904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102218 (or 102210 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 55591904 is about 7455.9978540769. The cubic root of 55591904 is about 381.6546132063.

The spelling of 55591904 in words is "fifty-five million, five hundred ninety-one thousand, nine hundred four".