388862139 has 4 divisors (see below), whose sum is σ = 518482856. Its totient is φ = 259241424.

The previous prime is 388862099. The next prime is 388862141. The reversal of 388862139 is 931268883.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 388862139 - 2⁸ = 388861883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388862179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64810354 + ... + 64810359.

It is an arithmetic number, because the mean of its divisors is an integer number (129620714).

Almost surely, 2^388862139 is an apocalyptic number.

388862139 is a deficient number, since it is larger than the sum of its proper divisors (129620717).

388862139 is a wasteful number, since it uses less digits than its factorization.

388862139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129620716.

The product of its digits is 497664, while the sum is 48.

The square root of 388862139 is about 19719.5876985296. The cubic root of 388862139 is about 729.9031203142.

The spelling of 388862139 in words is "three hundred eighty-eight million, eight hundred sixty-two thousand, one hundred thirty-nine".