389665867218 has 32 divisors (see below), whose sum is σ = 807789326400. Its totient is φ = 125163291456.

The previous prime is 389665867187. The next prime is 389665867223. The reversal of 389665867218 is 812768566983.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2111296 + ... + 2288427.

It is an arithmetic number, because the mean of its divisors is an integer number (25243416450).

Almost surely, 2^389665867218 is an apocalyptic number.

389665867218 is an abundant number, since it is smaller than the sum of its proper divisors (418123459182).

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

389665867218 is a wasteful number, since it uses less digits than its factorization.

389665867218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4400266.

The product of its digits is 209018880, while the sum is 69.

The spelling of 389665867218 in words is "three hundred eighty-nine billion, six hundred sixty-five million, eight hundred sixty-seven thousand, two hundred eighteen".