864218236 has 24 divisors (see below), whose sum is σ = 1742053376. Its totient is φ = 367461360.

The previous prime is 864218219. The next prime is 864218321. The reversal of 864218236 is 632812468.

It is a congruent number.

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, 117960 + ... + 125071.

Almost surely, 2^864218236 is an apocalyptic number.

It is an amenable number.

864218236 is an abundant number, since it is smaller than the sum of its proper divisors (877835140).

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

864218236 is a wasteful number, since it uses less digits than its factorization.

864218236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243169 (or 243167 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 864218236 is about 29397.5889487556. The cubic root of 864218236 is about 952.5208161097.

The spelling of 864218236 in words is "eight hundred sixty-four million, two hundred eighteen thousand, two hundred thirty-six".