56785861 has 24 divisors (see below), whose sum is σ = 65997792. Its totient is φ = 48412800.

The previous prime is 56785853. The next prime is 56785867. The reversal of 56785861 is 16858765.

It is not a de Polignac number, because 56785861 - 2³ = 56785853 is a prime.

It is a super-2 number, since 2×56785861² = 6449268019022642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56785867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 684126 + ... + 684208.

It is an arithmetic number, because the mean of its divisors is an integer number (2749908).

Almost surely, 2^56785861 is an apocalyptic number.

It is an amenable number.

56785861 is a deficient number, since it is larger than the sum of its proper divisors (9211931).

56785861 is a wasteful number, since it uses less digits than its factorization.

56785861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 172 counting only the distinct ones).

The product of its digits is 403200, while the sum is 46.

The square root of 56785861 is about 7535.6393889304. The cubic root of 56785861 is about 384.3675702268.

The spelling of 56785861 in words is "fifty-six million, seven hundred eighty-five thousand, eight hundred sixty-one".