56505840 has 40 divisors (see below), whose sum is σ = 175168848. Its totient is φ = 15068160.

The previous prime is 56505817. The next prime is 56505853. The reversal of 56505840 is 4850565.

It is a tau number, because it is divible by the number of its divisors (40).

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, 117481 + ... + 117960.

Almost surely, 2^56505840 is an apocalyptic number.

It is an amenable number.

56505840 is an abundant number, since it is smaller than the sum of its proper divisors (118663008).

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

56505840 is a wasteful number, since it uses less digits than its factorization.

56505840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235457 (or 235451 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 56505840 is about 7517.0366501701. The cubic root of 56505840 is about 383.7347343325.

The spelling of 56505840 in words is "fifty-six million, five hundred five thousand, eight hundred forty".