856838 has 8 divisors (see below), whose sum is σ = 1291032. Its totient is φ = 426496.

The previous prime is 856831. The next prime is 856841. The reversal of 856838 is 838658.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320 + ... + 1347.

It is an arithmetic number, because the mean of its divisors is an integer number (161379).

2⁸⁵⁶⁸³⁸ is an apocalyptic number.

856838 is a deficient number, since it is larger than the sum of its proper divisors (434194).

856838 is a wasteful number, since it uses less digits than its factorization.

856838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926.

The product of its digits is 46080, while the sum is 38.

The square root of 856838 is about 925.6554434561. The cubic root of 856838 is about 94.9801620627.

The spelling of 856838 in words is "eight hundred fifty-six thousand, eight hundred thirty-eight".