56839861 has 16 divisors (see below), whose sum is σ = 62686960. Its totient is φ = 51217920.

The previous prime is 56839843. The next prime is 56839889. The reversal of 56839861 is 16893865.

It can be written as a sum of positive squares in 8 ways, for example, as 17589636 + 39250225 = 4194^2 + 6265^2 .

It is not a de Polignac number, because 56839861 - 2¹¹ = 56837813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56839841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181441 + ... + 181753.

It is an arithmetic number, because the mean of its divisors is an integer number (3917935).

Almost surely, 2^56839861 is an apocalyptic number.

It is an amenable number.

56839861 is a deficient number, since it is larger than the sum of its proper divisors (5847099).

56839861 is a wasteful number, since it uses less digits than its factorization.

56839861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616.

The product of its digits is 311040, while the sum is 46.

The square root of 56839861 is about 7539.2215115355. The cubic root of 56839861 is about 384.4893685800.

The spelling of 56839861 in words is "fifty-six million, eight hundred thirty-nine thousand, eight hundred sixty-one".