56455784 has 64 divisors (see below), whose sum is σ = 135596160. Its totient is φ = 21392640.

The previous prime is 56455753. The next prime is 56455799. The reversal of 56455784 is 48755465.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21554 + ... + 24030.

It is an arithmetic number, because the mean of its divisors is an integer number (2118690).

Almost surely, 2^56455784 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 56455784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67798080).

56455784 is an abundant number, since it is smaller than the sum of its proper divisors (79140376).

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

56455784 is a wasteful number, since it uses less digits than its factorization.

56455784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538 (or 2534 counting only the distinct ones).

The product of its digits is 672000, while the sum is 44.

The square root of 56455784 is about 7513.7064089569. The cubic root of 56455784 is about 383.6213897026.

The spelling of 56455784 in words is "fifty-six million, four hundred fifty-five thousand, seven hundred eighty-four".