138612648 has 16 divisors (see below), whose sum is σ = 346531680. Its totient is φ = 46204208.

The previous prime is 138612647. The next prime is 138612667. The reversal of 138612648 is 846216831.

138612648 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (138612647) 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, 2887740 + ... + 2887787.

It is an arithmetic number, because the mean of its divisors is an integer number (21658230).

Almost surely, 2^138612648 is an apocalyptic number.

It is an amenable number.

138612648 is an abundant number, since it is smaller than the sum of its proper divisors (207919032).

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

138612648 is a wasteful number, since it uses less digits than its factorization.

138612648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5775536 (or 5775532 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 138612648 is about 11773.3872780946. The cubic root of 138612648 is about 517.5285185805.

The spelling of 138612648 in words is "one hundred thirty-eight million, six hundred twelve thousand, six hundred forty-eight".