56057920 has 56 divisors (see below), whose sum is σ = 137818368. Its totient is φ = 21696000.

The previous prime is 56057917. The next prime is 56057921. The reversal of 56057920 is 2975065.

It is not an unprimeable number, because it can be changed into a prime (56057921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7095 + ... + 12745.

Almost surely, 2^56057920 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 56057920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68909184).

56057920 is an abundant number, since it is smaller than the sum of its proper divisors (81760448).

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

56057920 is a wasteful number, since it uses less digits than its factorization.

56057920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5699 (or 5689 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 56057920 is about 7487.1837161913. The cubic root of 56057920 is about 382.7180922657.

The spelling of 56057920 in words is "fifty-six million, fifty-seven thousand, nine hundred twenty".