138711588 has 12 divisors (see below), whose sum is σ = 323660400. Its totient is φ = 46237192.

The previous prime is 138711583. The next prime is 138711589. The reversal of 138711588 is 885117831.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (138711581) 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, 5779638 + ... + 5779661.

It is an arithmetic number, because the mean of its divisors is an integer number (26971700).

Almost surely, 2^138711588 is an apocalyptic number.

It is an amenable number.

138711588 is an abundant number, since it is smaller than the sum of its proper divisors (184948812).

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

138711588 is a wasteful number, since it uses less digits than its factorization.

138711588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11559306 (or 11559304 counting only the distinct ones).

The product of its digits is 53760, while the sum is 42.

The square root of 138711588 is about 11777.5883779320. The cubic root of 138711588 is about 517.6516244543.

The spelling of 138711588 in words is "one hundred thirty-eight million, seven hundred eleven thousand, five hundred eighty-eight".