138209272 has 16 divisors (see below), whose sum is σ = 260031240. Its totient is φ = 68867616.

The previous prime is 138209261. The next prime is 138209293. The reversal of 138209272 is 272902831.

138209272 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27138 + ... + 31825.

Almost surely, 2^138209272 is an apocalyptic number.

It is an amenable number.

138209272 is a deficient number, since it is larger than the sum of its proper divisors (121821968).

138209272 is a wasteful number, since it uses less digits than its factorization.

138209272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59262 (or 59258 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 138209272 is about 11756.2439579995. The cubic root of 138209272 is about 517.0260117333.

The spelling of 138209272 in words is "one hundred thirty-eight million, two hundred nine thousand, two hundred seventy-two".