857557012 has 24 divisors (see below), whose sum is σ = 1617012936. Its totient is φ = 395587968.

The previous prime is 857557009. The next prime is 857557033. The reversal of 857557012 is 210755758.

It can be written as a sum of positive squares in 4 ways, for example, as 4356 + 857552656 = 66^2 + 29284^2 .

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, 144618 + ... + 150430.

It is an arithmetic number, because the mean of its divisors is an integer number (67375539).

Almost surely, 2^857557012 is an apocalyptic number.

It is an amenable number.

857557012 is a deficient number, since it is larger than the sum of its proper divisors (759455924).

857557012 is a wasteful number, since it uses less digits than its factorization.

857557012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8667 (or 8665 counting only the distinct ones).

The product of its (nonzero) digits is 98000, while the sum is 40.

The square root of 857557012 is about 29284.0743749909. The cubic root of 857557012 is about 950.0672203589.

The spelling of 857557012 in words is "eight hundred fifty-seven million, five hundred fifty-seven thousand, twelve".