138911384 has 16 divisors (see below), whose sum is σ = 260867520. Its totient is φ = 69346720.

The previous prime is 138911351. The next prime is 138911401. The reversal of 138911384 is 483119831.

It is a congruent number.

It is an unprimeable number.

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, 8072 + ... + 18519.

It is an arithmetic number, because the mean of its divisors is an integer number (16304220).

Almost surely, 2^138911384 is an apocalyptic number.

It is an amenable number.

138911384 is a deficient number, since it is larger than the sum of its proper divisors (121956136).

138911384 is a wasteful number, since it uses less digits than its factorization.

138911384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27250 (or 27246 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 138911384 is about 11786.0673678713. The cubic root of 138911384 is about 517.9000418325.

The spelling of 138911384 in words is "one hundred thirty-eight million, nine hundred eleven thousand, three hundred eighty-four".