56380566 has 32 divisors (see below), whose sum is σ = 123970176. Its totient is φ = 16952000.

The previous prime is 56380549. The next prime is 56380573. The reversal of 56380566 is 66508365.

56380566 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 15 ways as a sum of consecutive naturals, for example, 5386 + ... + 11906.

It is an arithmetic number, because the mean of its divisors is an integer number (3874068).

Almost surely, 2^56380566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56380566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61985088).

56380566 is an abundant number, since it is smaller than the sum of its proper divisors (67589610).

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

56380566 is a wasteful number, since it uses less digits than its factorization.

56380566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6668.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 56380566 is about 7508.6993547485. The cubic root of 56380566 is about 383.4509432866.

The spelling of 56380566 in words is "fifty-six million, three hundred eighty thousand, five hundred sixty-six".