858172168 has 32 divisors (see below), whose sum is σ = 1848591360. Its totient is φ = 365857920.

The previous prime is 858172157. The next prime is 858172187. The reversal of 858172168 is 861271858.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29421 + ... + 50812.

It is an arithmetic number, because the mean of its divisors is an integer number (57768480).

Almost surely, 2^858172168 is an apocalyptic number.

It is an amenable number.

858172168 is an abundant number, since it is smaller than the sum of its proper divisors (990419192).

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

858172168 is a wasteful number, since it uses less digits than its factorization.

858172168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80437 (or 80433 counting only the distinct ones).

The product of its digits is 215040, while the sum is 46.

The square root of 858172168 is about 29294.5757436424. The cubic root of 858172168 is about 950.2943383433.

The spelling of 858172168 in words is "eight hundred fifty-eight million, one hundred seventy-two thousand, one hundred sixty-eight".