857824836 has 96 divisors (see below), whose sum is σ = 2317593600. Its totient is φ = 244379520.

The previous prime is 857824829. The next prime is 857824853. The reversal of 857824836 is 638428758.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176730 + ... + 181518.

It is an arithmetic number, because the mean of its divisors is an integer number (24141600).

Almost surely, 2^857824836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 857824836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1158796800).

857824836 is an abundant number, since it is smaller than the sum of its proper divisors (1459768764).

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

857824836 is a wasteful number, since it uses less digits than its factorization.

857824836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4889 (or 4887 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 51.

The square root of 857824836 is about 29288.6468789529. The cubic root of 857824836 is about 950.1661153653.

The spelling of 857824836 in words is "eight hundred fifty-seven million, eight hundred twenty-four thousand, eight hundred thirty-six".