386889918 has 16 divisors (see below), whose sum is σ = 779429520. Its totient is φ = 128021696.

The previous prime is 386889917. The next prime is 386889953. The reversal of 386889918 is 819988683.

It is a happy number.

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386889917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234513 + ... + 236156.

It is an arithmetic number, because the mean of its divisors is an integer number (48714345).

Almost surely, 2^386889918 is an apocalyptic number.

386889918 is an abundant number, since it is smaller than the sum of its proper divisors (392539602).

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

386889918 is a wasteful number, since it uses less digits than its factorization.

386889918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470811.

The product of its digits is 5971968, while the sum is 60.

The square root of 386889918 is about 19669.5174826430. The cubic root of 386889918 is about 728.6670603200.

The spelling of 386889918 in words is "three hundred eighty-six million, eight hundred eighty-nine thousand, nine hundred eighteen".