857085992 has 32 divisors (see below), whose sum is σ = 1861780800. Its totient is φ = 362289024.

The previous prime is 857085973. The next prime is 857085997. The reversal of 857085992 is 299580758.

It is not an unprimeable number, because it can be changed into a prime (857085997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100742 + ... + 108917.

It is an arithmetic number, because the mean of its divisors is an integer number (58180650).

Almost surely, 2^857085992 is an apocalyptic number.

It is an amenable number.

857085992 is an abundant number, since it is smaller than the sum of its proper divisors (1004694808).

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

857085992 is a wasteful number, since it uses less digits than its factorization.

857085992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209745 (or 209741 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 53.

The square root of 857085992 is about 29276.0310151496. The cubic root of 857085992 is about 949.8932445136.

The spelling of 857085992 in words is "eight hundred fifty-seven million, eighty-five thousand, nine hundred ninety-two".