56507580 has 36 divisors (see below), whose sum is σ = 171406872. Its totient is φ = 15068640.

The previous prime is 56507569. The next prime is 56507617. The reversal of 56507580 is 8570565.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156786 + ... + 157145.

It is an arithmetic number, because the mean of its divisors is an integer number (4761302).

Almost surely, 2^56507580 is an apocalyptic number.

It is an amenable number.

56507580 is an abundant number, since it is smaller than the sum of its proper divisors (114899292).

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

56507580 is a wasteful number, since it uses less digits than its factorization.

56507580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313946 (or 313941 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 56507580 is about 7517.1523863761. The cubic root of 56507580 is about 383.7386731087.

The spelling of 56507580 in words is "fifty-six million, five hundred seven thousand, five hundred eighty".