138860752 has 20 divisors (see below), whose sum is σ = 280740960. Its totient is φ = 66411488.

The previous prime is 138860707. The next prime is 138860767. The reversal of 138860752 is 257068831.

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 3 ways as a sum of consecutive naturals, for example, 188302 + ... + 189037.

It is an arithmetic number, because the mean of its divisors is an integer number (14037048).

Almost surely, 2^138860752 is an apocalyptic number.

It is an amenable number.

138860752 is an abundant number, since it is smaller than the sum of its proper divisors (141880208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138860752 is a wasteful number, since it uses less digits than its factorization.

138860752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377370 (or 377364 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 138860752 is about 11783.9192122146. The cubic root of 138860752 is about 517.8371108215.

The spelling of 138860752 in words is "one hundred thirty-eight million, eight hundred sixty thousand, seven hundred fifty-two".