388139013 has 16 divisors (see below), whose sum is σ = 579163200. Its totient is φ = 256895280.

The previous prime is 388138997. The next prime is 388139021. The reversal of 388139013 is 310931883.

It is not a de Polignac number, because 388139013 - 2⁴ = 388138997 is a prime.

It is a super-2 number, since 2×388139013² = 301303786825228338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388139033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47958 + ... + 55463.

It is an arithmetic number, because the mean of its divisors is an integer number (36197700).

Almost surely, 2^388139013 is an apocalyptic number.

It is an amenable number.

388139013 is a deficient number, since it is larger than the sum of its proper divisors (191024187).

388139013 is a wasteful number, since it uses less digits than its factorization.

388139013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103569 (or 103563 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 388139013 is about 19701.2439454975. The cubic root of 388139013 is about 729.4503982298.

The spelling of 388139013 in words is "three hundred eighty-eight million, one hundred thirty-nine thousand, thirteen".