138027834 has 128 divisors (see below), whose sum is σ = 367718400. Its totient is φ = 37558080.

The previous prime is 138027833. The next prime is 138027887. The reversal of 138027834 is 438720831.

138027834 is a `hidden beast` number, since 1 + 380 + 278 + 3 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (138027833) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 992937 + ... + 993075.

It is an arithmetic number, because the mean of its divisors is an integer number (2872800).

Almost surely, 2^138027834 is an apocalyptic number.

138027834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138027834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183859200).

138027834 is an abundant number, since it is smaller than the sum of its proper divisors (229690566).

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

138027834 is a wasteful number, since it uses less digits than its factorization.

138027834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 138027834 is about 11748.5247584537. The cubic root of 138027834 is about 516.7996659803.

The spelling of 138027834 in words is "one hundred thirty-eight million, twenty-seven thousand, eight hundred thirty-four".