56909385 has 56 divisors (see below), whose sum is σ = 110358024. Its totient is φ = 27993600.

The previous prime is 56909381. The next prime is 56909417. The reversal of 56909385 is 58390965.

56909385 is a `hidden beast` number, since 569 + 0 + 9 + 3 + 85 = 666.

56909385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3370896 + 53538489 = 1836^2 + 7317^2 .

It is not a de Polignac number, because 56909385 - 2² = 56909381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 56909385.

It is not an unprimeable number, because it can be changed into a prime (56909381) 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 55 ways as a sum of consecutive naturals, for example, 46785 + ... + 47985.

It is an arithmetic number, because the mean of its divisors is an integer number (1970679).

Almost surely, 2^56909385 is an apocalyptic number.

It is an amenable number.

56909385 is a deficient number, since it is larger than the sum of its proper divisors (53448639).

56909385 is a wasteful number, since it uses less digits than its factorization.

56909385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 56909385 is about 7543.8309233439. The cubic root of 56909385 is about 384.6460681623.

The spelling of 56909385 in words is "fifty-six million, nine hundred nine thousand, three hundred eighty-five".