56711928 has 128 divisors (see below), whose sum is σ = 182246400. Its totient is φ = 14294016.

The previous prime is 56711909. The next prime is 56711929. The reversal of 56711928 is 82911765.

56711928 = 417² + 418² + ... + 623².

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56711929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49668 + ... + 50796.

It is an arithmetic number, because the mean of its divisors is an integer number (1423800).

Almost surely, 2^56711928 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 56711928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91123200).

56711928 is an abundant number, since it is smaller than the sum of its proper divisors (125534472).

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

56711928 is a wasteful number, since it uses less digits than its factorization.

56711928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181 (or 1177 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 56711928 is about 7530.7322353142. The cubic root of 56711928 is about 384.2006871987.

The spelling of 56711928 in words is "fifty-six million, seven hundred eleven thousand, nine hundred twenty-eight".