138917552 has 20 divisors (see below), whose sum is σ = 269390496. Its totient is φ = 69397440.

The previous prime is 138917551. The next prime is 138917593. The reversal of 138917552 is 255719831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138917551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18953 + ... + 25239.

Almost surely, 2^138917552 is an apocalyptic number.

It is an amenable number.

138917552 is a deficient number, since it is larger than the sum of its proper divisors (130472944).

138917552 is a wasteful number, since it uses less digits than its factorization.

138917552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7676 (or 7670 counting only the distinct ones).

The product of its digits is 75600, while the sum is 41.

The square root of 138917552 is about 11786.3290298549. The cubic root of 138917552 is about 517.9077070554.

The spelling of 138917552 in words is "one hundred thirty-eight million, nine hundred seventeen thousand, five hundred fifty-two".