138973252 has 24 divisors (see below), whose sum is σ = 266186592. Its totient is φ = 62961600.

The previous prime is 138973223. The next prime is 138973253. The reversal of 138973252 is 252379831.

It is not an unprimeable number, because it can be changed into a prime (138973253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8727 + ... + 18817.

It is an arithmetic number, because the mean of its divisors is an integer number (11091108).

Almost surely, 2^138973252 is an apocalyptic number.

It is an amenable number.

138973252 is a deficient number, since it is larger than the sum of its proper divisors (127213340).

138973252 is a wasteful number, since it uses less digits than its factorization.

138973252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10419 (or 10417 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 138973252 is about 11788.6917000997. The cubic root of 138973252 is about 517.9769174233.

The spelling of 138973252 in words is "one hundred thirty-eight million, nine hundred seventy-three thousand, two hundred fifty-two".