857084992 has 28 divisors (see below), whose sum is σ = 1742265756. Its totient is φ = 418088960.

The previous prime is 857084957. The next prime is 857085037. The reversal of 857084992 is 299480758.

It can be written as a sum of positive squares in 2 ways, for example, as 330657856 + 526427136 = 18184^2 + 22944^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160693 + ... + 165940.

It is an arithmetic number, because the mean of its divisors is an integer number (62223777).

Almost surely, 2^857084992 is an apocalyptic number.

857084992 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

857084992 is an abundant number, since it is smaller than the sum of its proper divisors (885180764).

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

857084992 is a wasteful number, since it uses less digits than its factorization.

857084992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326686 (or 326676 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 52.

The square root of 857084992 is about 29276.0139363268. The cubic root of 857084992 is about 949.8928750860.

The spelling of 857084992 in words is "eight hundred fifty-seven million, eighty-four thousand, nine hundred ninety-two".