866724 has 12 divisors (see below), whose sum is σ = 2022384. Its totient is φ = 288904.

The previous prime is 866717. The next prime is 866737. The reversal of 866724 is 427668.

866724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

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, 36102 + ... + 36125.

It is an arithmetic number, because the mean of its divisors is an integer number (168532).

2⁸⁶⁶⁷²⁴ is an apocalyptic number.

It is an amenable number.

866724 is an abundant number, since it is smaller than the sum of its proper divisors (1155660).

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

866724 is a wasteful number, since it uses less digits than its factorization.

866724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72234 (or 72232 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 866724 is about 930.9801286816. The cubic root of 866724 is about 95.3440525653.

The spelling of 866724 in words is "eight hundred sixty-six thousand, seven hundred twenty-four".