856879344 has 80 divisors (see below), whose sum is σ = 2463056640. Its totient is φ = 285220800.

The previous prime is 856879259. The next prime is 856879357. The reversal of 856879344 is 443978658.

856879344 is a `hidden beast` number, since 8 + 568 + 79 + 3 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (5806080) is a multiple of the sum of its prime factors (2835).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589819 + ... + 591269.

It is an arithmetic number, because the mean of its divisors is an integer number (30788208).

Almost surely, 2^856879344 is an apocalyptic number.

It is an amenable number.

856879344 is an abundant number, since it is smaller than the sum of its proper divisors (1606177296).

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

856879344 is a wasteful number, since it uses less digits than its factorization.

856879344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835 (or 2823 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 856879344 is about 29272.5014988470. The cubic root of 856879344 is about 949.8168969363.

The spelling of 856879344 in words is "eight hundred fifty-six million, eight hundred seventy-nine thousand, three hundred forty-four".