856394 has 32 divisors (see below), whose sum is σ = 1645056. Its totient is φ = 324720.

The previous prime is 856393. The next prime is 856411. The reversal of 856394 is 493658.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10277 + ... + 10359.

It is an arithmetic number, because the mean of its divisors is an integer number (51408).

2⁸⁵⁶³⁹⁴ is an apocalyptic number.

856394 is a deficient number, since it is larger than the sum of its proper divisors (788662).

856394 is a wasteful number, since it uses less digits than its factorization.

856394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170.

The product of its digits is 25920, while the sum is 35.

The square root of 856394 is about 925.4155823196. The cubic root of 856394 is about 94.9637534852.

The spelling of 856394 in words is "eight hundred fifty-six thousand, three hundred ninety-four".