856744 has 16 divisors (see below), whose sum is σ = 1836000. Its totient is φ = 367152.

The previous prime is 856733. The next prime is 856759. The reversal of 856744 is 447658.

It is a d-powerful number, because it can be written as 8⁵ + 5³ + 7⁷ + 6² + 4² + 4⁴ .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7594 + ... + 7705.

It is an arithmetic number, because the mean of its divisors is an integer number (114750).

2⁸⁵⁶⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

856744 is an abundant number, since it is smaller than the sum of its proper divisors (979256).

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

856744 is a wasteful number, since it uses less digits than its factorization.

856744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15312 (or 15308 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 856744 is about 925.6046672311. The cubic root of 856744 is about 94.9766886478.

It can be divided in two parts, 856 and 744, that added together give a square (1600 = 40²).

The spelling of 856744 in words is "eight hundred fifty-six thousand, seven hundred forty-four".