866422212 has 24 divisors (see below), whose sum is σ = 2091364800. Its totient is φ = 278848416.

The previous prime is 866422201. The next prime is 866422231. The reversal of 866422212 is 212224668.

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, 1244512 + ... + 1245207.

It is an arithmetic number, because the mean of its divisors is an integer number (87140200).

Almost surely, 2^866422212 is an apocalyptic number.

It is an amenable number.

866422212 is an abundant number, since it is smaller than the sum of its proper divisors (1224942588).

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

866422212 is a wasteful number, since it uses less digits than its factorization.

866422212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489755 (or 2489753 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 866422212 is about 29435.0507388725. The cubic root of 866422212 is about 953.3298520855.

It can be divided in two parts, 8664 and 22212, that added together give a triangular number (30876 = T₂₄₈).

The spelling of 866422212 in words is "eight hundred sixty-six million, four hundred twenty-two thousand, two hundred twelve".