138046668 has 12 divisors (see below), whose sum is σ = 322108920. Its totient is φ = 46015552.

The previous prime is 138046637. The next prime is 138046669. The reversal of 138046668 is 866640831.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (138046669) 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, 5751933 + ... + 5751956.

It is an arithmetic number, because the mean of its divisors is an integer number (26842410).

Almost surely, 2^138046668 is an apocalyptic number.

It is an amenable number.

138046668 is an abundant number, since it is smaller than the sum of its proper divisors (184062252).

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

138046668 is a wasteful number, since it uses less digits than its factorization.

138046668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11503896 (or 11503894 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 138046668 is about 11749.3262785574. The cubic root of 138046668 is about 516.8231708101.

The spelling of 138046668 in words is "one hundred thirty-eight million, forty-six thousand, six hundred sixty-eight".