56209920 has 160 divisors (see below), whose sum is σ = 193862592. Its totient is φ = 13811712.

The previous prime is 56209897. The next prime is 56209921. The reversal of 56209920 is 2990265.

It is a tau number, because it is divible by the number of its divisors (160).

It is not an unprimeable number, because it can be changed into a prime (56209921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99559 + ... + 100121.

Almost surely, 2^56209920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56209920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96931296).

56209920 is an abundant number, since it is smaller than the sum of its proper divisors (137652672).

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

56209920 is a wasteful number, since it uses less digits than its factorization.

56209920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 56209920 is about 7497.3275238581. The cubic root of 56209920 is about 383.0636910715.

The spelling of 56209920 in words is "fifty-six million, two hundred nine thousand, nine hundred twenty".