55978944 has 56 divisors (see below), whose sum is σ = 169273728. Its totient is φ = 15993600.

The previous prime is 55978913. The next prime is 55978999. The reversal of 55978944 is 44987955.

It is a tau number, because it is divible by the number of its divisors (56).

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, 19482 + ... + 22169.

Almost surely, 2^55978944 is an apocalyptic number.

It is an amenable number.

55978944 is an abundant number, since it is smaller than the sum of its proper divisors (113294784).

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

55978944 is a wasteful number, since it uses less digits than its factorization.

55978944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41673 (or 41663 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 51.

The square root of 55978944 is about 7481.9077781004. The cubic root of 55978944 is about 382.5382797351.

It can be divided in two parts, 5597 and 8944, that added together give a palindrome (14541).

The spelling of 55978944 in words is "fifty-five million, nine hundred seventy-eight thousand, nine hundred forty-four".