138502972 has 24 divisors (see below), whose sum is σ = 247186800. Its totient is φ = 67885056.

The previous prime is 138502963. The next prime is 138502993. The reversal of 138502972 is 279205831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119548 + ... + 120700.

It is an arithmetic number, because the mean of its divisors is an integer number (10299450).

Almost surely, 2^138502972 is an apocalyptic number.

It is an amenable number.

138502972 is a deficient number, since it is larger than the sum of its proper divisors (108683828).

138502972 is a wasteful number, since it uses less digits than its factorization.

138502972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1725 (or 1723 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 138502972 is about 11768.7285634430. The cubic root of 138502972 is about 517.3919859827.

The spelling of 138502972 in words is "one hundred thirty-eight million, five hundred two thousand, nine hundred seventy-two".