389163918 has 32 divisors (see below), whose sum is σ = 914401152. Its totient is φ = 108856800.

The previous prime is 389163877. The next prime is 389163919. The reversal of 389163918 is 819361983.

It is a super-2 number, since 2×389163918² = 302897110146221448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389163919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225928 + ... + 227643.

It is an arithmetic number, because the mean of its divisors is an integer number (28575036).

Almost surely, 2^389163918 is an apocalyptic number.

389163918 is an abundant number, since it is smaller than the sum of its proper divisors (525237234).

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

389163918 is a wasteful number, since it uses less digits than its factorization.

389163918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453600.

The product of its digits is 279936, while the sum is 48.

The square root of 389163918 is about 19727.2379719007. The cubic root of 389163918 is about 730.0918868510.

The spelling of 389163918 in words is "three hundred eighty-nine million, one hundred sixty-three thousand, nine hundred eighteen".