864943818 has 8 divisors (see below), whose sum is σ = 1729887648. Its totient is φ = 288314604.

The previous prime is 864943817. The next prime is 864943823. The reversal of 864943818 is 818349468.

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

864943818 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (864943813) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 72078646 + ... + 72078657.

It is an arithmetic number, because the mean of its divisors is an integer number (216235956).

Almost surely, 2^864943818 is an apocalyptic number.

864943818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

864943818 is a wasteful number, since it uses less digits than its factorization.

864943818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144157308.

The product of its digits is 1327104, while the sum is 51.

The square root of 864943818 is about 29409.9272015420. The cubic root of 864943818 is about 952.7873146242.

The spelling of 864943818 in words is "eight hundred sixty-four million, nine hundred forty-three thousand, eight hundred eighteen".