56291328 has 104 divisors (see below), whose sum is σ = 167096400. Its totient is φ = 18726912.

The previous prime is 56291321. The next prime is 56291363. The reversal of 56291328 is 82319265.

56291328 is a `hidden beast` number, since 5 + 629 + 1 + 3 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 56291292 and 56291301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56291321) 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, 110338 + ... + 110846.

Almost surely, 2^56291328 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 56291328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83548200).

56291328 is an abundant number, since it is smaller than the sum of its proper divisors (110805072).

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

56291328 is an equidigital number, since it uses as much as digits as its factorization.

56291328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 514 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 56291328 is about 7502.7546941107. The cubic root of 56291328 is about 383.2485303692.

The spelling of 56291328 in words is "fifty-six million, two hundred ninety-one thousand, three hundred twenty-eight".