855872 has 28 divisors (see below), whose sum is σ = 1743456. Its totient is φ = 416640.

The previous prime is 855863. The next prime is 855887. The reversal of 855872 is 278558.

It is a congruent number.

It is an unprimeable number.

855872 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 3 ways as a sum of consecutive naturals, for example, 2597 + ... + 2907.

2⁸⁵⁵⁸⁷² 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 855872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (871728).

855872 is an abundant number, since it is smaller than the sum of its proper divisors (887584).

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

855872 is a wasteful number, since it uses less digits than its factorization.

855872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 356 counting only the distinct ones).

The product of its digits is 22400, while the sum is 35.

The square root of 855872 is about 925.1335038793. The cubic root of 855872 is about 94.9444550647.

The spelling of 855872 in words is "eight hundred fifty-five thousand, eight hundred seventy-two".