138230992 has 20 divisors (see below), whose sum is σ = 268350880. Its totient is φ = 68979168.

The previous prime is 138230951. The next prime is 138230999. The reversal of 138230992 is 299032831.

138230992 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138230999) 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, 109 + ... + 16627.

It is an arithmetic number, because the mean of its divisors is an integer number (13417544).

Almost surely, 2^138230992 is an apocalyptic number.

It is an amenable number.

138230992 is a deficient number, since it is larger than the sum of its proper divisors (130119888).

138230992 is a wasteful number, since it uses less digits than its factorization.

138230992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17050 (or 17044 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 138230992 is about 11757.1676861394. The cubic root of 138230992 is about 517.0530943755.

The spelling of 138230992 in words is "one hundred thirty-eight million, two hundred thirty thousand, nine hundred ninety-two".