866984 has 32 divisors (see below), whose sum is σ = 1744200. Its totient is φ = 403200.

The previous prime is 866969. The next prime is 867001. The reversal of 866984 is 489668.

866984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 850084 + 16900 = 922^2 + 130^2 .

It is a super-2 number, since 2×866984² = 1503322512512, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 866984.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8534 + ... + 8634.

2⁸⁶⁶⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

866984 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

866984 is a wasteful number, since it uses less digits than its factorization.

866984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 169 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 866984 is about 931.1197559928. The cubic root of 866984 is about 95.3535853867.

The spelling of 866984 in words is "eight hundred sixty-six thousand, nine hundred eighty-four".