56861940 has 96 divisors (see below), whose sum is σ = 170481024. Its totient is φ = 14110720.

The previous prime is 56861929. The next prime is 56861947. The reversal of 56861940 is 4916865.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56861947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108880 + ... + 109400.

It is an arithmetic number, because the mean of its divisors is an integer number (1775844).

Almost surely, 2^56861940 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 56861940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85240512).

56861940 is an abundant number, since it is smaller than the sum of its proper divisors (113619084).

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

56861940 is a wasteful number, since it uses less digits than its factorization.

56861940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 56861940 is about 7540.6856452182. The cubic root of 56861940 is about 384.5391460992.

It can be divided in two parts, 5686 and 1940, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 56861940 in words is "fifty-six million, eight hundred sixty-one thousand, nine hundred forty".