56856969 has 36 divisors (see below), whose sum is σ = 90665484. Its totient is φ = 34130304.

The previous prime is 56856929. The next prime is 56856973. The reversal of 56856969 is 96965865.

It can be written as a sum of positive squares in 6 ways, for example, as 4149369 + 52707600 = 2037^2 + 7260^2 .

It is not a de Polignac number, because 56856969 - 2¹⁷ = 56725897 is a prime.

It is a super-2 number, since 2×56856969² = 6465429847733922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56856929) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 328567 + ... + 328739.

Almost surely, 2^56856969 is an apocalyptic number.

It is an amenable number.

56856969 is a deficient number, since it is larger than the sum of its proper divisors (33808515).

56856969 is a wasteful number, since it uses less digits than its factorization.

56856969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 242 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The square root of 56856969 is about 7540.3560260773. The cubic root of 56856969 is about 384.5279400107.

The spelling of 56856969 in words is "fifty-six million, eight hundred fifty-six thousand, nine hundred sixty-nine".