138834556 has 12 divisors (see below), whose sum is σ = 277669168. Its totient is φ = 59500512.

The previous prime is 138834541. The next prime is 138834581. The reversal of 138834556 is 655438831.

138834556 is an admirable number.

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, 2479161 + ... + 2479216.

Almost surely, 2^138834556 is an apocalyptic number.

It is an amenable number.

138834556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138834556 is a wasteful number, since it uses less digits than its factorization.

138834556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4958388 (or 4958386 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

The square root of 138834556 is about 11782.8076450394. The cubic root of 138834556 is about 517.8045455505.

The spelling of 138834556 in words is "one hundred thirty-eight million, eight hundred thirty-four thousand, five hundred fifty-six".