389988 has 48 divisors (see below), whose sum is σ = 1061760. Its totient is φ = 123552.

The previous prime is 389981. The next prime is 389989. The reversal of 389988 is 889983.

It is not an unprimeable number, because it can be changed into a prime (389981) by changing a digit.

389988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2406 + ... + 2562.

It is an arithmetic number, because the mean of its divisors is an integer number (22120).

2³⁸⁹⁹⁸⁸ 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 389988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (530880).

389988 is an abundant number, since it is smaller than the sum of its proper divisors (671772).

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

389988 is a wasteful number, since it uses less digits than its factorization.

389988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 185 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 389988 is about 624.4901920767. The cubic root of 389988 is about 73.0606863849.

The spelling of 389988 in words is "three hundred eighty-nine thousand, nine hundred eighty-eight".