856224 has 48 divisors (see below), whose sum is σ = 2499840. Its totient is φ = 285120.

The previous prime is 856213. The next prime is 856237. The reversal of 856224 is 422658.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

856224 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369 + ... + 1359.

It is an arithmetic number, because the mean of its divisors is an integer number (52080).

2⁸⁵⁶²²⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1249920).

856224 is an abundant number, since it is smaller than the sum of its proper divisors (1643616).

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

856224 is a wasteful number, since it uses less digits than its factorization.

856224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010 (or 996 counting only the distinct ones).

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

The square root of 856224 is about 925.3237271355. The cubic root of 856224 is about 94.9574694203.

The spelling of 856224 in words is "eight hundred fifty-six thousand, two hundred twenty-four".