866040222 has 16 divisors (see below), whose sum is σ = 1741151232. Its totient is φ = 287168280.

The previous prime is 866040209. The next prime is 866040247. The reversal of 866040222 is 222040668.

It is a super-2 number, since 2×866040222² = 1500051332243618568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 866040222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376708 + ... + 378999.

It is an arithmetic number, because the mean of its divisors is an integer number (108821952).

Almost surely, 2^866040222 is an apocalyptic number.

866040222 is an abundant number, since it is smaller than the sum of its proper divisors (875111010).

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

866040222 is a wasteful number, since it uses less digits than its factorization.

866040222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755903.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 866040222 is about 29428.5613307888. The cubic root of 866040222 is about 953.1897294848.

The spelling of 866040222 in words is "eight hundred sixty-six million, forty thousand, two hundred twenty-two".