866322 has 32 divisors (see below), whose sum is σ = 1964160. Its totient is φ = 282960.

The previous prime is 866311. The next prime is 866329. The reversal of 866322 is 223668.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (866329) by changing a digit.

866322 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3163 + ... + 3425.

It is an arithmetic number, because the mean of its divisors is an integer number (61380).

2⁸⁶⁶³²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (982080).

866322 is an abundant number, since it is smaller than the sum of its proper divisors (1097838).

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

866322 is a wasteful number, since it uses less digits than its factorization.

866322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 329 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 866322 is about 930.7642021479. The cubic root of 866322 is about 95.3293096035.

The spelling of 866322 in words is "eight hundred sixty-six thousand, three hundred twenty-two".