138875272 has 8 divisors (see below), whose sum is σ = 260391150. Its totient is φ = 69437632.

The previous prime is 138875249. The next prime is 138875279. The reversal of 138875272 is 272578831.

It can be written as a sum of positive squares in only one way, i.e., 118679236 + 20196036 = 10894^2 + 4494^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (138875279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8679697 + ... + 8679712.

Almost surely, 2^138875272 is an apocalyptic number.

It is an amenable number.

138875272 is a deficient number, since it is larger than the sum of its proper divisors (121515878).

138875272 is a wasteful number, since it uses less digits than its factorization.

138875272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17359415 (or 17359411 counting only the distinct ones).

The product of its digits is 188160, while the sum is 43.

The square root of 138875272 is about 11784.5352899467. The cubic root of 138875272 is about 517.8551594366.

The spelling of 138875272 in words is "one hundred thirty-eight million, eight hundred seventy-five thousand, two hundred seventy-two".