857942868 has 24 divisors (see below), whose sum is σ = 2010691872. Its totient is φ = 284720224.

The previous prime is 857942851. The next prime is 857942903. The reversal of 857942868 is 868249758.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154755 + ... + 160202.

It is an arithmetic number, because the mean of its divisors is an integer number (83778828).

Almost surely, 2^857942868 is an apocalyptic number.

It is an amenable number.

857942868 is an abundant number, since it is smaller than the sum of its proper divisors (1152749004).

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

857942868 is a wasteful number, since it uses less digits than its factorization.

857942868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315191 (or 315189 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 57.

The square root of 857942868 is about 29290.6617883584. The cubic root of 857942868 is about 950.2096925849.

The spelling of 857942868 in words is "eight hundred fifty-seven million, nine hundred forty-two thousand, eight hundred sixty-eight".