56856618 has 96 divisors (see below), whose sum is σ = 153543936. Its totient is φ = 14805504.

The previous prime is 56856601. The next prime is 56856649. The reversal of 56856618 is 81665865.

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 47 ways as a sum of consecutive naturals, for example, 168546 + ... + 168882.

It is an arithmetic number, because the mean of its divisors is an integer number (1599416).

Almost surely, 2^56856618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56856618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76771968).

56856618 is an abundant number, since it is smaller than the sum of its proper divisors (96687318).

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

56856618 is a wasteful number, since it uses less digits than its factorization.

56856618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 465 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 56856618 is about 7540.3327512783. The cubic root of 56856618 is about 384.5271487293.

The spelling of 56856618 in words is "fifty-six million, eight hundred fifty-six thousand, six hundred eighteen".