388639239 has 8 divisors (see below), whose sum is σ = 520790400. Its totient is φ = 257790456.

The previous prime is 388639201. The next prime is 388639247. The reversal of 388639239 is 932936883.

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

It is not a de Polignac number, because 388639239 - 2¹⁷ = 388508167 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 388639191 and 388639200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388639739) 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 7 ways as a sum of consecutive naturals, for example, 324897 + ... + 326090.

It is an arithmetic number, because the mean of its divisors is an integer number (65098800).

Almost surely, 2^388639239 is an apocalyptic number.

388639239 is a deficient number, since it is larger than the sum of its proper divisors (132151161).

388639239 is a wasteful number, since it uses less digits than its factorization.

388639239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651189.

The product of its digits is 1679616, while the sum is 51.

The square root of 388639239 is about 19713.9351475042. The cubic root of 388639239 is about 729.7636308608.

The spelling of 388639239 in words is "three hundred eighty-eight million, six hundred thirty-nine thousand, two hundred thirty-nine".