56013720 has 64 divisors (see below), whose sum is σ = 192049920. Its totient is φ = 12802944.

The previous prime is 56013709. The next prime is 56013733. The reversal of 56013720 is 2731065.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32502 + ... + 34181.

It is an arithmetic number, because the mean of its divisors is an integer number (3000780).

Almost surely, 2^56013720 is an apocalyptic number.

It is an amenable number.

56013720 is an abundant number, since it is smaller than the sum of its proper divisors (136036200).

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

56013720 is a wasteful number, since it uses less digits than its factorization.

56013720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66704 (or 66700 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 56013720 is about 7484.2314234663. The cubic root of 56013720 is about 382.6174785458.

Adding to 56013720 its reverse (2731065), we get a palindrome (58744785).

The spelling of 56013720 in words is "fifty-six million, thirteen thousand, seven hundred twenty".