56477784 has 128 divisors (see below), whose sum is σ = 162938880. Its totient is φ = 16156800.

The previous prime is 56477779. The next prime is 56477803. The reversal of 56477784 is 48777465.

56477784 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 548277 + ... + 548379.

It is an arithmetic number, because the mean of its divisors is an integer number (1272960).

Almost surely, 2^56477784 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 56477784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81469440).

56477784 is an abundant number, since it is smaller than the sum of its proper divisors (106461096).

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

56477784 is a wasteful number, since it uses less digits than its factorization.

56477784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 217 counting only the distinct ones).

The product of its digits is 1317120, while the sum is 48.

The square root of 56477784 is about 7515.1702575524. The cubic root of 56477784 is about 383.6712137947.

It can be divided in two parts, 5647 and 7784, that added together give a palindrome (13431).

The spelling of 56477784 in words is "fifty-six million, four hundred seventy-seven thousand, seven hundred eighty-four".