856422 has 36 divisors (see below), whose sum is σ = 2160756. Its totient is φ = 244440.

The previous prime is 856421. The next prime is 856441. The reversal of 856422 is 224658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856421) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 397 + ... + 1367.

It is an arithmetic number, because the mean of its divisors is an integer number (60021).

2⁸⁵⁶⁴²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080378).

856422 is an abundant number, since it is smaller than the sum of its proper divisors (1304334).

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

856422 is a wasteful number, since it uses less digits than its factorization.

856422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993 (or 983 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 856422 is about 925.4307105343. The cubic root of 856422 is about 94.9647884279.

The spelling of 856422 in words is "eight hundred fifty-six thousand, four hundred twenty-two".