138671104 has 88 divisors (see below), whose sum is σ = 326013408. Its totient is φ = 58122240.

The previous prime is 138671089. The next prime is 138671111. The reversal of 138671104 is 401176831.

It is a tau number, because it is divible by the number of its divisors (88).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145959 + ... + 146905.

Almost surely, 2^138671104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138671104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163006704).

138671104 is an abundant number, since it is smaller than the sum of its proper divisors (187342304).

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

138671104 is a wasteful number, since it uses less digits than its factorization.

138671104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991 (or 973 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 138671104 is about 11775.8695644950. The cubic root of 138671104 is about 517.6012594061.

The spelling of 138671104 in words is "one hundred thirty-eight million, six hundred seventy-one thousand, one hundred four".