138388592 has 40 divisors (see below), whose sum is σ = 273308400. Its totient is φ = 67871232.

The previous prime is 138388573. The next prime is 138388597. The reversal of 138388592 is 295883831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138388597) 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 7 ways as a sum of consecutive naturals, for example, 223259 + ... + 223877.

It is an arithmetic number, because the mean of its divisors is an integer number (6832710).

Almost surely, 2^138388592 is an apocalyptic number.

It is an amenable number.

138388592 is a deficient number, since it is larger than the sum of its proper divisors (134919808).

138388592 is a wasteful number, since it uses less digits than its factorization.

138388592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873 (or 867 counting only the distinct ones).

The product of its digits is 414720, while the sum is 47.

The square root of 138388592 is about 11763.8680713446. The cubic root of 138388592 is about 517.2495207039.

The spelling of 138388592 in words is "one hundred thirty-eight million, three hundred eighty-eight thousand, five hundred ninety-two".