138338774 has 16 divisors (see below), whose sum is σ = 238281216. Its totient is φ = 59005800.

The previous prime is 138338773. The next prime is 138338779. The reversal of 138338774 is 477833831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138338773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20462 + ... + 26369.

It is an arithmetic number, because the mean of its divisors is an integer number (14892576).

Almost surely, 2^138338774 is an apocalyptic number.

138338774 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138338774 is a deficient number, since it is larger than the sum of its proper divisors (99942442).

138338774 is a wasteful number, since it uses less digits than its factorization.

138338774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47051.

The product of its digits is 338688, while the sum is 44.

The square root of 138338774 is about 11761.7504649606. The cubic root of 138338774 is about 517.1874456707.

The spelling of 138338774 in words is "one hundred thirty-eight million, three hundred thirty-eight thousand, seven hundred seventy-four".