138539576 has 16 divisors (see below), whose sum is σ = 296870640. Its totient is φ = 59374080.

The previous prime is 138539563. The next prime is 138539617. The reversal of 138539576 is 675935831.

138539576 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 138539576.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1236905 + ... + 1237016.

It is an arithmetic number, because the mean of its divisors is an integer number (18554415).

Almost surely, 2^138539576 is an apocalyptic number.

It is an amenable number.

138539576 is an abundant number, since it is smaller than the sum of its proper divisors (158331064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138539576 is a wasteful number, since it uses less digits than its factorization.

138539576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473934 (or 2473930 counting only the distinct ones).

The product of its digits is 680400, while the sum is 47.

The square root of 138539576 is about 11770.2835989623. The cubic root of 138539576 is about 517.4375612938.

The spelling of 138539576 in words is "one hundred thirty-eight million, five hundred thirty-nine thousand, five hundred seventy-six".