856368672 has 48 divisors (see below), whose sum is σ = 2256331392. Its totient is φ = 284394240.

The previous prime is 856368649. The next prime is 856368679. The reversal of 856368672 is 276863658.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (856368679) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9558 + ... + 42474.

It is an arithmetic number, because the mean of its divisors is an integer number (47006904).

Almost surely, 2^856368672 is an apocalyptic number.

It is an amenable number.

856368672 is an abundant number, since it is smaller than the sum of its proper divisors (1399962720).

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

856368672 is a wasteful number, since it uses less digits than its factorization.

856368672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33201 (or 33193 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 51.

The square root of 856368672 is about 29263.7774731835. Note that the first 3 decimals coincide. The cubic root of 856368672 is about 949.6281728618.

The spelling of 856368672 in words is "eight hundred fifty-six million, three hundred sixty-eight thousand, six hundred seventy-two".