866226 has 16 divisors (see below), whose sum is σ = 1808064. Its totient is φ = 276144.

The previous prime is 866221. The next prime is 866231. The reversal of 866226 is 622668.

It is an interprime number because it is at equal distance from previous prime (866221) and next prime (866231).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 866193 and 866202.

It is not an unprimeable number, because it can be changed into a prime (866221) by changing a digit.

866226 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 7 ways as a sum of consecutive naturals, for example, 3001 + ... + 3276.

It is an arithmetic number, because the mean of its divisors is an integer number (113004).

2⁸⁶⁶²²⁶ is an apocalyptic number.

866226 is an abundant number, since it is smaller than the sum of its proper divisors (941838).

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

866226 is a wasteful number, since it uses less digits than its factorization.

866226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6305.

The product of its digits is 6912, while the sum is 30.

The square root of 866226 is about 930.7126301926. The cubic root of 866226 is about 95.3257882217.

The spelling of 866226 in words is "eight hundred sixty-six thousand, two hundred twenty-six".