388389 has 8 divisors (see below), whose sum is σ = 532000. Its totient is φ = 251856.

The previous prime is 388373. The next prime is 388391. The reversal of 388389 is 983883.

388389 = T₁₂₆ + T₁₂₇ + ... + T₁₆₂.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 388389 - 2⁴ = 388373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388319) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1639 + ... + 1860.

It is an arithmetic number, because the mean of its divisors is an integer number (66500).

2³⁸⁸³⁸⁹ is an apocalyptic number.

It is an amenable number.

388389 is a deficient number, since it is larger than the sum of its proper divisors (143611).

388389 is a wasteful number, since it uses less digits than its factorization.

388389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3539.

The product of its digits is 41472, while the sum is 39.

The square root of 388389 is about 623.2086328029. The cubic root of 388389 is about 72.9606969265.

It can be divided in two parts, 388 and 389, that added together give a palindrome (777).

The spelling of 388389 in words is "three hundred eighty-eight thousand, three hundred eighty-nine".