389616318 has 240 divisors, whose sum is σ = 1147893120. Its totient is φ = 96437952.

The previous prime is 389616313. The next prime is 389616341. The reversal of 389616318 is 813616983.

It is a happy number.

389616318 is a `hidden beast` number, since 3 + 8 + 9 + 6 + 1 + 631 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389616313) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 3641221 + ... + 3641327.

It is an arithmetic number, because the mean of its divisors is an integer number (4782888).

Almost surely, 2^389616318 is an apocalyptic number.

389616318 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 389616318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (573946560).

389616318 is an abundant number, since it is smaller than the sum of its proper divisors (758276802).

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

389616318 is a wasteful number, since it uses less digits than its factorization.

389616318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 151 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 389616318 is about 19738.7010210905. The cubic root of 389616318 is about 730.3746859912.

The spelling of 389616318 in words is "three hundred eighty-nine million, six hundred sixteen thousand, three hundred eighteen".