138505548 has 12 divisors (see below), whose sum is σ = 323179640. Its totient is φ = 46168512.

The previous prime is 138505513. The next prime is 138505559. The reversal of 138505548 is 845505831.

138505548 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

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, 5771053 + ... + 5771076.

Almost surely, 2^138505548 is an apocalyptic number.

It is an amenable number.

138505548 is an abundant number, since it is smaller than the sum of its proper divisors (184674092).

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

138505548 is a wasteful number, since it uses less digits than its factorization.

138505548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11542136 (or 11542134 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 39.

The square root of 138505548 is about 11768.8380055127. The cubic root of 138505548 is about 517.3951935997.

The spelling of 138505548 in words is "one hundred thirty-eight million, five hundred five thousand, five hundred forty-eight".