388704139 has 8 divisors (see below), whose sum is σ = 408701520. Its totient is φ = 369146400.

The previous prime is 388704101. The next prime is 388704157. The reversal of 388704139 is 931407883.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 388704139 - 2⁷ = 388704011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 388704095 and 388704104.

It is not an unprimeable number, because it can be changed into a prime (388704739) 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, 108097 + ... + 111634.

It is an arithmetic number, because the mean of its divisors is an integer number (51087690).

Almost surely, 2^388704139 is an apocalyptic number.

388704139 is a deficient number, since it is larger than the sum of its proper divisors (19997381).

388704139 is a wasteful number, since it uses less digits than its factorization.

388704139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219821.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 388704139 is about 19715.5811225538. The cubic root of 388704139 is about 729.8042503855.

The spelling of 388704139 in words is "three hundred eighty-eight million, seven hundred four thousand, one hundred thirty-nine".