856258285 has 16 divisors (see below), whose sum is σ = 1071608832. Its totient is φ = 656064000.

The previous prime is 856258279. The next prime is 856258289. The reversal of 856258285 is 582852658.

It is not a de Polignac number, because 856258285 - 2¹³ = 856250093 is a prime.

It is a super-2 number, since 2×856258285² = 1466356501262282450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856258289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13441 + ... + 43510.

It is an arithmetic number, because the mean of its divisors is an integer number (66975552).

Almost surely, 2^856258285 is an apocalyptic number.

It is an amenable number.

856258285 is a deficient number, since it is larger than the sum of its proper divisors (215350547).

856258285 is a wasteful number, since it uses less digits than its factorization.

856258285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57084.

The product of its digits is 1536000, while the sum is 49.

The square root of 856258285 is about 29261.8913435205. The cubic root of 856258285 is about 949.5873683529.

The spelling of 856258285 in words is "eight hundred fifty-six million, two hundred fifty-eight thousand, two hundred eighty-five".