389018918 has 16 divisors (see below), whose sum is σ = 609487200. Its totient is φ = 185872896.

The previous prime is 389018909. The next prime is 389018921. The reversal of 389018918 is 819810983.

It is a happy number.

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, 52508 + ... + 59456.

It is an arithmetic number, because the mean of its divisors is an integer number (38092950).

Almost surely, 2^389018918 is an apocalyptic number.

389018918 is a deficient number, since it is larger than the sum of its proper divisors (220468282).

389018918 is a wasteful number, since it uses less digits than its factorization.

389018918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8191.

The product of its (nonzero) digits is 124416, while the sum is 47.

The square root of 389018918 is about 19723.5625078230. The cubic root of 389018918 is about 730.0011997228.

The spelling of 389018918 in words is "three hundred eighty-nine million, eighteen thousand, nine hundred eighteen".