857934 has 48 divisors (see below), whose sum is σ = 2321280. Its totient is φ = 222480.

The previous prime is 857929. The next prime is 857951. The reversal of 857934 is 439758.

It is a congruent number.

It is an unprimeable number.

857934 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1077 + ... + 1695.

It is an arithmetic number, because the mean of its divisors is an integer number (48360).

2⁸⁵⁷⁹³⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 857934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1160640).

857934 is an abundant number, since it is smaller than the sum of its proper divisors (1463346).

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

857934 is a wasteful number, since it uses less digits than its factorization.

857934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 642 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 857934 is about 926.2472672024. The cubic root of 857934 is about 95.0206418673.

The spelling of 857934 in words is "eight hundred fifty-seven thousand, nine hundred thirty-four".