864637222 has 8 divisors (see below), whose sum is σ = 1301888016. Its totient is φ = 430674552.

The previous prime is 864637157. The next prime is 864637223. The reversal of 864637222 is 222736468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864637223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821373 + ... + 822424.

It is an arithmetic number, because the mean of its divisors is an integer number (162736002).

Almost surely, 2^864637222 is an apocalyptic number.

864637222 is a deficient number, since it is larger than the sum of its proper divisors (437250794).

864637222 is a wasteful number, since it uses less digits than its factorization.

864637222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644062.

The product of its digits is 193536, while the sum is 40.

The square root of 864637222 is about 29404.7142818970. The cubic root of 864637222 is about 952.6747233798.

The spelling of 864637222 in words is "eight hundred sixty-four million, six hundred thirty-seven thousand, two hundred twenty-two".