856825974 has 24 divisors (see below), whose sum is σ = 1858512240. Its totient is φ = 285292368.

The previous prime is 856825951. The next prime is 856826011. The reversal of 856825974 is 479528658.

856825974 is a `hidden beast` number, since 8 + 568 + 2 + 5 + 9 + 74 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 856825974.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9357 + ... + 42440.

It is an arithmetic number, because the mean of its divisors is an integer number (77438010).

Almost surely, 2^856825974 is an apocalyptic number.

856825974 is an abundant number, since it is smaller than the sum of its proper divisors (1001686266).

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

856825974 is a wasteful number, since it uses less digits than its factorization.

856825974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52724 (or 52721 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The square root of 856825974 is about 29271.5898782420. The cubic root of 856825974 is about 949.7971770147.

The spelling of 856825974 in words is "eight hundred fifty-six million, eight hundred twenty-five thousand, nine hundred seventy-four".