138934556 has 12 divisors (see below), whose sum is σ = 249706968. Its totient is φ = 67589712.

The previous prime is 138934553. The next prime is 138934573. The reversal of 138934556 is 655439831.

138934556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138934553) 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, 469226 + ... + 469521.

It is an arithmetic number, because the mean of its divisors is an integer number (20808914).

Almost surely, 2^138934556 is an apocalyptic number.

It is an amenable number.

138934556 is a deficient number, since it is larger than the sum of its proper divisors (110772412).

138934556 is a wasteful number, since it uses less digits than its factorization.

138934556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938788 (or 938786 counting only the distinct ones).

The product of its digits is 388800, while the sum is 44.

The square root of 138934556 is about 11787.0503519753. The cubic root of 138934556 is about 517.9288374387.

The spelling of 138934556 in words is "one hundred thirty-eight million, nine hundred thirty-four thousand, five hundred fifty-six".