388989 has 8 divisors (see below), whose sum is σ = 576320. Its totient is φ = 259308.

The previous prime is 388963. The next prime is 388991. The reversal of 388989 is 989883.

It is not a de Polignac number, because 388989 - 2⁹ = 388477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388489) 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, 7177 + ... + 7230.

It is an arithmetic number, because the mean of its divisors is an integer number (72040).

2³⁸⁸⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

388989 is a deficient number, since it is larger than the sum of its proper divisors (187331).

388989 is a wasteful number, since it uses less digits than its factorization.

388989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14416 (or 14410 counting only the distinct ones).

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

The square root of 388989 is about 623.6898267569. The cubic root of 388989 is about 72.9982485349.

The spelling of 388989 in words is "three hundred eighty-eight thousand, nine hundred eighty-nine".