856056558 has 24 divisors (see below), whose sum is σ = 1991642472. Its totient is φ = 244587504.

The previous prime is 856056541. The next prime is 856056559. The reversal of 856056558 is 855650658.

856056558 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856056559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1455585 + ... + 1456172.

It is an arithmetic number, because the mean of its divisors is an integer number (82985103).

Almost surely, 2^856056558 is an apocalyptic number.

856056558 is an abundant number, since it is smaller than the sum of its proper divisors (1135585914).

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

856056558 is a wasteful number, since it uses less digits than its factorization.

856056558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911776 (or 2911769 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 48.

The square root of 856056558 is about 29258.4442170119. Note that the first 3 decimals coincide. The cubic root of 856056558 is about 949.5127909894.

The spelling of 856056558 in words is "eight hundred fifty-six million, fifty-six thousand, five hundred fifty-eight".