138127734 has 64 divisors (see below), whose sum is σ = 317649600. Its totient is φ = 44457984.

The previous prime is 138127727. The next prime is 138127747. The reversal of 138127734 is 437721831.

138127734 is a `hidden beast` number, since 1 + 381 + 277 + 3 + 4 = 666.

138127734 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 an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 513352 + ... + 513620.

It is an arithmetic number, because the mean of its divisors is an integer number (4963275).

Almost surely, 2^138127734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138127734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158824800).

138127734 is an abundant number, since it is smaller than the sum of its proper divisors (179521866).

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

138127734 is a wasteful number, since it uses less digits than its factorization.

138127734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 568 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 138127734 is about 11752.7755870688. The cubic root of 138127734 is about 516.9243167712.

The spelling of 138127734 in words is "one hundred thirty-eight million, one hundred twenty-seven thousand, seven hundred thirty-four".