856724 has 12 divisors (see below), whose sum is σ = 1635648. Its totient is φ = 389400.

The previous prime is 856721. The next prime is 856733. The reversal of 856724 is 427658.

It is a d-powerful number, because it can be written as 8 + 5³ + 7⁷ + 6³ + 2¹⁵ + 4³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9692 + ... + 9779.

It is an arithmetic number, because the mean of its divisors is an integer number (136304).

2⁸⁵⁶⁷²⁴ is an apocalyptic number.

It is an amenable number.

856724 is a deficient number, since it is larger than the sum of its proper divisors (778924).

856724 is a wasteful number, since it uses less digits than its factorization.

856724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19486 (or 19484 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 856724 is about 925.5938634196. The cubic root of 856724 is about 94.9759495905.

The spelling of 856724 in words is "eight hundred fifty-six thousand, seven hundred twenty-four".