857831568 has 40 divisors (see below), whose sum is σ = 2417526816. Its totient is φ = 259948800.

The previous prime is 857831567. The next prime is 857831603. The reversal of 857831568 is 865138758.

It is a self number, because there is not a number n which added to its sum of digits gives 857831568.

It is not an unprimeable number, because it can be changed into a prime (857831563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 811813 + ... + 812868.

Almost surely, 2^857831568 is an apocalyptic number.

857831568 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

857831568 is an abundant number, since it is smaller than the sum of its proper divisors (1559695248).

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

857831568 is a wasteful number, since it uses less digits than its factorization.

857831568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624703 (or 1624697 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 51.

The square root of 857831568 is about 29288.7618038045. The cubic root of 857831568 is about 950.1686009161.

The spelling of 857831568 in words is "eight hundred fifty-seven million, eight hundred thirty-one thousand, five hundred sixty-eight".