56081728 has 56 divisors (see below), whose sum is σ = 119969280. Its totient is φ = 25935360.

The previous prime is 56081723. The next prime is 56081777. The reversal of 56081728 is 82718065.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56081723) 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, 45018 + ... + 46246.

Almost surely, 2^56081728 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 56081728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59984640).

56081728 is an abundant number, since it is smaller than the sum of its proper divisors (63887552).

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

56081728 is a wasteful number, since it uses less digits than its factorization.

56081728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295 (or 1285 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 56081728 is about 7488.7734643265. The cubic root of 56081728 is about 382.7722651802.

The spelling of 56081728 in words is "fifty-six million, eighty-one thousand, seven hundred twenty-eight".