866830 has 16 divisors (see below), whose sum is σ = 1652400. Its totient is φ = 326272.

The previous prime is 866819. The next prime is 866843. The reversal of 866830 is 38668.

866830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 866792 and 866801.

It is a congruent number.

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, 2380 + ... + 2719.

It is an arithmetic number, because the mean of its divisors is an integer number (103275).

2⁸⁶⁶⁸³⁰ is an apocalyptic number.

866830 is a deficient number, since it is larger than the sum of its proper divisors (785570).

866830 is a wasteful number, since it uses less digits than its factorization.

866830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 866830 is about 931.0370561906. The cubic root of 866830 is about 95.3479392534.

The spelling of 866830 in words is "eight hundred sixty-six thousand, eight hundred thirty".