138872112 has 80 divisors (see below), whose sum is σ = 373452288. Its totient is φ = 44432640.

The previous prime is 138872093. The next prime is 138872143. The reversal of 138872112 is 211278831.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125353 + ... + 126455.

Almost surely, 2^138872112 is an apocalyptic number.

138872112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138872112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186726144).

138872112 is an abundant number, since it is smaller than the sum of its proper divisors (234580176).

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

138872112 is a wasteful number, since it uses less digits than its factorization.

138872112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218 (or 1212 counting only the distinct ones).

The product of its digits is 5376, while the sum is 33.

The square root of 138872112 is about 11784.4012151657. The cubic root of 138872112 is about 517.8512316082.

The spelling of 138872112 in words is "one hundred thirty-eight million, eight hundred seventy-two thousand, one hundred twelve".