214866636 has 12 divisors (see below), whose sum is σ = 501355512. Its totient is φ = 71622208.

The previous prime is 214866629. The next prime is 214866637. The reversal of 214866636 is 636668412.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (214866637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8952765 + ... + 8952788.

It is an arithmetic number, because the mean of its divisors is an integer number (41779626).

Almost surely, 2^214866636 is an apocalyptic number.

It is an amenable number.

214866636 is an abundant number, since it is smaller than the sum of its proper divisors (286488876).

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

214866636 is a wasteful number, since it uses less digits than its factorization.

214866636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17905560 (or 17905558 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The square root of 214866636 is about 14658.3299185139. The cubic root of 214866636 is about 598.9487480803.

The spelling of 214866636 in words is "two hundred fourteen million, eight hundred sixty-six thousand, six hundred thirty-six".