138171834 has 24 divisors (see below), whose sum is σ = 309696660. Its totient is φ = 44468928.

The previous prime is 138171829. The next prime is 138171841. The reversal of 138171834 is 438171831.

138171834 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 133749225 + 4422609 = 11565^2 + 2103^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131827 + ... + 132870.

Almost surely, 2^138171834 is an apocalyptic number.

138171834 is an abundant number, since it is smaller than the sum of its proper divisors (171524826).

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

138171834 is a wasteful number, since it uses less digits than its factorization.

138171834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264734 (or 264731 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 138171834 is about 11754.6515899026. The cubic root of 138171834 is about 516.9793236745.

It can be divided in two parts, 13817 and 1834, that added together give a palindrome (15651).

The spelling of 138171834 in words is "one hundred thirty-eight million, one hundred seventy-one thousand, eight hundred thirty-four".