856189 has 8 divisors (see below), whose sum is σ = 898560. Its totient is φ = 814800.

The previous prime is 856187. The next prime is 856213. The reversal of 856189 is 981658.

856189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 856189 - 2¹ = 856187 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2007 + ... + 2395.

It is an arithmetic number, because the mean of its divisors is an integer number (112320).

2⁸⁵⁶¹⁸⁹ is an apocalyptic number.

It is an amenable number.

856189 is a deficient number, since it is larger than the sum of its proper divisors (42371).

856189 is a wasteful number, since it uses less digits than its factorization.

856189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491.

The product of its digits is 17280, while the sum is 37.

The square root of 856189 is about 925.3048146422. The cubic root of 856189 is about 94.9561755390.

The spelling of 856189 in words is "eight hundred fifty-six thousand, one hundred eighty-nine".