138011926 has 16 divisors (see below), whose sum is σ = 223758864. Its totient is φ = 63464544.

The previous prime is 138011921. The next prime is 138011927. The reversal of 138011926 is 629110831.

138011926 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 (138011921) 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 7 ways as a sum of consecutive naturals, for example, 2380 + ... + 16783.

It is an arithmetic number, because the mean of its divisors is an integer number (13984929).

Almost surely, 2^138011926 is an apocalyptic number.

138011926 is a deficient number, since it is larger than the sum of its proper divisors (85746938).

138011926 is a wasteful number, since it uses less digits than its factorization.

138011926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19455.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 138011926 is about 11747.8477177737. The cubic root of 138011926 is about 516.7798111324.

The spelling of 138011926 in words is "one hundred thirty-eight million, eleven thousand, nine hundred twenty-six".