388538539 has 4 divisors (see below), whose sum is σ = 388857456. Its totient is φ = 388219624.

The previous prime is 388538477. The next prime is 388538567. The reversal of 388538539 is 935835883.

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

It is a cyclic number.

It is not a de Polignac number, because 388538539 - 2¹⁵ = 388505771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388538599) 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, 157624 + ... + 160069.

It is an arithmetic number, because the mean of its divisors is an integer number (97214364).

Almost surely, 2^388538539 is an apocalyptic number.

388538539 is a deficient number, since it is larger than the sum of its proper divisors (318917).

388538539 is a wasteful number, since it uses less digits than its factorization.

388538539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318916.

The product of its digits is 3110400, while the sum is 52.

The square root of 388538539 is about 19711.3809511155. The cubic root of 388538539 is about 729.7005959274.

It can be divided in two parts, 3885 and 38539, that added together give a palindrome (42424).

The spelling of 388538539 in words is "three hundred eighty-eight million, five hundred thirty-eight thousand, five hundred thirty-nine".