388939 has 4 divisors (see below), whose sum is σ = 392040. Its totient is φ = 385840.

The previous prime is 388937. The next prime is 388961. The reversal of 388939 is 939883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939883 = 7 ⋅134269.

It is a cyclic number.

It is not a de Polignac number, because 388939 - 2¹ = 388937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1354 + ... + 1615.

It is an arithmetic number, because the mean of its divisors is an integer number (98010).

2³⁸⁸⁹³⁹ is an apocalyptic number.

388939 is a deficient number, since it is larger than the sum of its proper divisors (3101).

388939 is a wasteful number, since it uses less digits than its factorization.

388939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3100.

The product of its digits is 46656, while the sum is 40.

The square root of 388939 is about 623.6497414415. The cubic root of 388939 is about 72.9951207097.

The spelling of 388939 in words is "three hundred eighty-eight thousand, nine hundred thirty-nine".