856912 has 30 divisors (see below), whose sum is σ = 1933098. Its totient is φ = 366912.

The previous prime is 856909. The next prime is 856927. The reversal of 856912 is 219658.

It can be written as a sum of positive squares in only one way, i.e., 853776 + 3136 = 924^2 + 56^2 .

It is an Ulam number.

It is a zygodrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 238 + ... + 1330.

2⁸⁵⁶⁹¹² 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 856912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (966549).

856912 is an abundant number, since it is smaller than the sum of its proper divisors (1076186).

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

856912 is a wasteful number, since it uses less digits than its factorization.

856912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115 (or 1102 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 856912 is about 925.6954142697. The cubic root of 856912 is about 94.9828962745.

The spelling of 856912 in words is "eight hundred fifty-six thousand, nine hundred twelve".