56891385 has 48 divisors (see below), whose sum is σ = 103574016. Its totient is φ = 28854144.

The previous prime is 56891363. The next prime is 56891411. The reversal of 56891385 is 58319865.

56891385 is a `hidden beast` number, since 568 + 9 + 1 + 3 + 85 = 666.

It is not a de Polignac number, because 56891385 - 2⁷ = 56891257 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 56891385.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77892 + ... + 78618.

It is an arithmetic number, because the mean of its divisors is an integer number (2157792).

Almost surely, 2^56891385 is an apocalyptic number.

It is an amenable number.

56891385 is a deficient number, since it is larger than the sum of its proper divisors (46682631).

56891385 is a wasteful number, since it uses less digits than its factorization.

56891385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822 (or 819 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 56891385 is about 7542.6378011940. The cubic root of 56891385 is about 384.6055103568.

The spelling of 56891385 in words is "fifty-six million, eight hundred ninety-one thousand, three hundred eighty-five".