138330672 has 20 divisors (see below), whose sum is σ = 357354360. Its totient is φ = 46110208.

The previous prime is 138330641. The next prime is 138330677. The reversal of 138330672 is 276033831.

It is not an unprimeable number, because it can be changed into a prime (138330677) by changing a digit.

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, 1440897 + ... + 1440992.

It is an arithmetic number, because the mean of its divisors is an integer number (17867718).

Almost surely, 2^138330672 is an apocalyptic number.

138330672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138330672 is an abundant number, since it is smaller than the sum of its proper divisors (219023688).

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

138330672 is a wasteful number, since it uses less digits than its factorization.

138330672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2881900 (or 2881894 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 138330672 is about 11761.4060383952. The cubic root of 138330672 is about 517.1773488763.

The spelling of 138330672 in words is "one hundred thirty-eight million, three hundred thirty thousand, six hundred seventy-two".