856258272 has 36 divisors (see below), whose sum is σ = 2434985280. Its totient is φ = 285419328.

The previous prime is 856258259. The next prime is 856258279. The reversal of 856258272 is 272852658.

856258272 is a `hidden beast` number, since 8 + 5 + 62 + 582 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856258279) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1486272 + ... + 1486847.

It is an arithmetic number, because the mean of its divisors is an integer number (67638480).

Almost surely, 2^856258272 is an apocalyptic number.

It is an amenable number.

856258272 is an abundant number, since it is smaller than the sum of its proper divisors (1578727008).

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

856258272 is a wasteful number, since it uses less digits than its factorization.

856258272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2973135 (or 2973124 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 856258272 is about 29261.8911213886. The cubic root of 856258272 is about 949.5873635472.

The spelling of 856258272 in words is "eight hundred fifty-six million, two hundred fifty-eight thousand, two hundred seventy-two".