138871308 has 12 divisors (see below), whose sum is σ = 324033080. Its totient is φ = 46290432.

The previous prime is 138871307. The next prime is 138871321. The reversal of 138871308 is 803178831.

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

It is not an unprimeable number, because it can be changed into a prime (138871301) 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, 5786293 + ... + 5786316.

Almost surely, 2^138871308 is an apocalyptic number.

It is an amenable number.

138871308 is an abundant number, since it is smaller than the sum of its proper divisors (185161772).

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

138871308 is a wasteful number, since it uses less digits than its factorization.

138871308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11572616 (or 11572614 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 138871308 is about 11784.3671022249. The cubic root of 138871308 is about 517.8502322398.

The spelling of 138871308 in words is "one hundred thirty-eight million, eight hundred seventy-one thousand, three hundred eight".