56857860 has 108 divisors (see below), whose sum is σ = 183378468. Its totient is φ = 14257152.

The previous prime is 56857859. The next prime is 56857873. The reversal of 56857860 is 6875865.

56857860 is a `hidden beast` number, since 568 + 5 + 7 + 86 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 15872256 + 40985604 = 3984^2 + 6402^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51474 + ... + 52566.

It is a vampire number, since it can be written as 6558 ⋅ 8670 (with its own digits).

Almost surely, 2^56857860 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 56857860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91689234).

56857860 is an abundant number, since it is smaller than the sum of its proper divisors (126520608).

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

56857860 is a wasteful number, since it uses less digits than its factorization.

56857860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 56857860 is about 7540.4151079367. The cubic root of 56857860 is about 384.5299486335.

The spelling of 56857860 in words is "fifty-six million, eight hundred fifty-seven thousand, eight hundred sixty".