55477020 has 24 divisors (see below), whose sum is σ = 155335824. Its totient is φ = 14793856.

The previous prime is 55477013. The next prime is 55477031. The reversal of 55477020 is 2077455.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 462249 + ... + 462368.

It is an arithmetic number, because the mean of its divisors is an integer number (6472326).

Almost surely, 2^55477020 is an apocalyptic number.

It is an amenable number.

55477020 is an abundant number, since it is smaller than the sum of its proper divisors (99858804).

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

55477020 is a wasteful number, since it uses less digits than its factorization.

55477020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924629 (or 924627 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 55477020 is about 7448.2897365771. The cubic root of 55477020 is about 381.3915278550.

The spelling of 55477020 in words is "fifty-five million, four hundred seventy-seven thousand, twenty".