856634 has 8 divisors (see below), whose sum is σ = 1352640. Its totient is φ = 405756.

The previous prime is 856627. The next prime is 856637. The reversal of 856634 is 436658.

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

It is a self number, because there is not a number n which added to its sum of digits gives 856634.

It is not an unprimeable number, because it can be changed into a prime (856637) 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, 11234 + ... + 11309.

It is an arithmetic number, because the mean of its divisors is an integer number (169080).

2⁸⁵⁶⁶³⁴ is an apocalyptic number.

856634 is a deficient number, since it is larger than the sum of its proper divisors (496006).

856634 is a wasteful number, since it uses less digits than its factorization.

856634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22564.

The product of its digits is 17280, while the sum is 32.

The square root of 856634 is about 925.5452447071. The cubic root of 856634 is about 94.9726236906.

The spelling of 856634 in words is "eight hundred fifty-six thousand, six hundred thirty-four".