56861688 has 64 divisors (see below), whose sum is σ = 158054400. Its totient is φ = 16928640.

The previous prime is 56861683. The next prime is 56861731. The reversal of 56861688 is 88616865.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56861683) 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, 6733 + ... + 12611.

It is an arithmetic number, because the mean of its divisors is an integer number (2469600).

Almost surely, 2^56861688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56861688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79027200).

56861688 is an abundant number, since it is smaller than the sum of its proper divisors (101192712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56861688 is a wasteful number, since it uses less digits than its factorization.

56861688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5932 (or 5928 counting only the distinct ones).

The product of its digits is 552960, while the sum is 48.

The square root of 56861688 is about 7540.6689358438. The cubic root of 56861688 is about 384.5385780332.

The spelling of 56861688 in words is "fifty-six million, eight hundred sixty-one thousand, six hundred eighty-eight".