56821744 has 40 divisors (see below), whose sum is σ = 127897568. Its totient is φ = 23950080.

The previous prime is 56821741. The next prime is 56821757. The reversal of 56821744 is 44712865.

56821744 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 not an unprimeable number, because it can be changed into a prime (56821741) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2674 + ... + 10990.

Almost surely, 2^56821744 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 56821744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63948784).

56821744 is an abundant number, since it is smaller than the sum of its proper divisors (71075824).

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

56821744 is a wasteful number, since it uses less digits than its factorization.

56821744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8393 (or 8387 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 56821744 is about 7538.0198991512. The cubic root of 56821744 is about 384.4485138348.

The spelling of 56821744 in words is "fifty-six million, eight hundred twenty-one thousand, seven hundred forty-four".