857312 has 24 divisors (see below), whose sum is σ = 1715616. Its totient is φ = 421632.

The previous prime is 857309. The next prime is 857321. The reversal of 857312 is 213758.

It is a congruent number.

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, 2153 + ... + 2519.

It is an arithmetic number, because the mean of its divisors is an integer number (71484).

2⁸⁵⁷³¹² is an apocalyptic number.

It is an amenable number.

857312 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

857312 is a wasteful number, since it uses less digits than its factorization.

857312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 442 counting only the distinct ones).

The product of its digits is 1680, while the sum is 26.

The square root of 857312 is about 925.9114428497. The cubic root of 857312 is about 94.9976730732.

The spelling of 857312 in words is "eight hundred fifty-seven thousand, three hundred twelve".