56481880 has 128 divisors (see below), whose sum is σ = 159667200. Its totient is φ = 17505792.

The previous prime is 56481863. The next prime is 56481883. The reversal of 56481880 is 8818465.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56481883) 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, 214629 + ... + 214891.

It is an arithmetic number, because the mean of its divisors is an integer number (1247400).

Almost surely, 2^56481880 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 56481880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79833600).

56481880 is an abundant number, since it is smaller than the sum of its proper divisors (103185320).

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

56481880 is a wasteful number, since it uses less digits than its factorization.

56481880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 56481880 is about 7515.4427680610. The cubic root of 56481880 is about 383.6804887059.

The spelling of 56481880 in words is "fifty-six million, four hundred eighty-one thousand, eight hundred eighty".