56865280 has 80 divisors (see below), whose sum is σ = 138350520. Its totient is φ = 22413312.

The previous prime is 56865251. The next prime is 56865283. The reversal of 56865280 is 8256865.

It can be written as a sum of positive squares in 4 ways, for example, as 53934336 + 2930944 = 7344^2 + 1712^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (56865283) 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, 248206 + ... + 248434.

Almost surely, 2^56865280 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 56865280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69175260).

56865280 is an abundant number, since it is smaller than the sum of its proper divisors (81485240).

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

56865280 is an equidigital number, since it uses as much as digits as its factorization.

56865280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 56865280 is about 7540.9071072385. The cubic root of 56865280 is about 384.5466750697.

The spelling of 56865280 in words is "fifty-six million, eight hundred sixty-five thousand, two hundred eighty".