866208 has 48 divisors (see below), whose sum is σ = 2600640. Its totient is φ = 247296.

The previous prime is 866197. The next prime is 866213. The reversal of 866208 is 802668.

866208 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 (48).

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, 28 + ... + 1316.

It is an arithmetic number, because the mean of its divisors is an integer number (54180).

2⁸⁶⁶²⁰⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1300320).

866208 is an abundant number, since it is smaller than the sum of its proper divisors (1734432).

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

866208 is a wasteful number, since it uses less digits than its factorization.

866208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 866208 is about 930.7029601328. The cubic root of 866208 is about 95.3251279336.

The spelling of 866208 in words is "eight hundred sixty-six thousand, two hundred eight".