853866858 has 32 divisors (see below), whose sum is σ = 1919062656. Its totient is φ = 251304768.

The previous prime is 853866857. The next prime is 853866863. The reversal of 853866858 is 858668358.

It is a super-2 number, since 2×853866858² = 1458177222381584328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 853866798 and 853866807.

It is not an unprimeable number, because it can be changed into a prime (853866851) 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, 236185 + ... + 239772.

It is an arithmetic number, because the mean of its divisors is an integer number (59970708).

Almost surely, 2^853866858 is an apocalyptic number.

853866858 is an abundant number, since it is smaller than the sum of its proper divisors (1065195798).

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

853866858 is a wasteful number, since it uses less digits than its factorization.

853866858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475998.

The product of its digits is 11059200, while the sum is 57.

The square root of 853866858 is about 29221.0002908867. Note that the first 3 decimals coincide. The cubic root of 853866858 is about 948.7025160888.

The spelling of 853866858 in words is "eight hundred fifty-three million, eight hundred sixty-six thousand, eight hundred fifty-eight".