56715428 has 48 divisors (see below), whose sum is σ = 125193600. Its totient is φ = 21838080.

The previous prime is 56715427. The next prime is 56715431. The reversal of 56715428 is 82451765.

It is a junction number, because it is equal to n+sod(n) for n = 56715391 and 56715400.

It is not an unprimeable number, because it can be changed into a prime (56715427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26378 + ... + 28446.

It is an arithmetic number, because the mean of its divisors is an integer number (2608200).

Almost surely, 2^56715428 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 56715428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62596800).

56715428 is an abundant number, since it is smaller than the sum of its proper divisors (68478172).

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

56715428 is a wasteful number, since it uses less digits than its factorization.

56715428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180 (or 2178 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 56715428 is about 7530.9646128501. The cubic root of 56715428 is about 384.2085907373.

The spelling of 56715428 in words is "fifty-six million, seven hundred fifteen thousand, four hundred twenty-eight".