866022 has 32 divisors (see below), whose sum is σ = 1838592. Its totient is φ = 271584.

The previous prime is 866011. The next prime is 866029. The reversal of 866022 is 220668.

It is a junction number, because it is equal to n+sod(n) for n = 865983 and 866001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866029) by changing a digit.

866022 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, 10393 + ... + 10475.

It is an arithmetic number, because the mean of its divisors is an integer number (57456).

2⁸⁶⁶⁰²² is an apocalyptic number.

866022 is an abundant number, since it is smaller than the sum of its proper divisors (972570).

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

866022 is a wasteful number, since it uses less digits than its factorization.

866022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 866022 is about 930.6030302981. The cubic root of 866022 is about 95.3183044212.

The spelling of 866022 in words is "eight hundred sixty-six thousand, twenty-two".