389318620 has 48 divisors (see below), whose sum is σ = 849774240. Its totient is φ = 149644544.

The previous prime is 389318617. The next prime is 389318623. The reversal of 389318620 is 26813983.

It is an interprime number because it is at equal distance from previous prime (389318617) and next prime (389318623).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389318623) 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, 130182 + ... + 133138.

It is an arithmetic number, because the mean of its divisors is an integer number (17703630).

Almost surely, 2^389318620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389318620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (424887120).

389318620 is an abundant number, since it is smaller than the sum of its proper divisors (460455620).

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

389318620 is a wasteful number, since it uses less digits than its factorization.

389318620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222 (or 3220 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 389318620 is about 19731.1586076439. The cubic root of 389318620 is about 730.1886170520.

The spelling of 389318620 in words is "three hundred eighty-nine million, three hundred eighteen thousand, six hundred twenty".