866900 has 18 divisors (see below), whose sum is σ = 1881390. Its totient is φ = 346720.

The previous prime is 866869. The next prime is 866909. The reversal of 866900 is 9668.

866900 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 3 ways, for example, as 42436 + 824464 = 206^2 + 908^2 .

It is a super-2 number, since 2×866900² = 1503031220000, which contains 22 as substring.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4235 + ... + 4434.

2⁸⁶⁶⁹⁰⁰ is an apocalyptic number.

It is an amenable number.

866900 is an abundant number, since it is smaller than the sum of its proper divisors (1014490).

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

866900 is a wasteful number, since it uses less digits than its factorization.

866900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8683 (or 8676 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 866900 is about 931.0746479203. The cubic root of 866900 is about 95.3505057605.

The spelling of 866900 in words is "eight hundred sixty-six thousand, nine hundred".