138091434 has 32 divisors (see below), whose sum is σ = 302313984. Its totient is φ = 41791680.

The previous prime is 138091427. The next prime is 138091439. The reversal of 138091434 is 434190831.

138091434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 138091395 and 138091404.

It is not an unprimeable number, because it can be changed into a prime (138091439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9754 + ... + 19269.

It is an arithmetic number, because the mean of its divisors is an integer number (9447312).

Almost surely, 2^138091434 is an apocalyptic number.

138091434 is an abundant number, since it is smaller than the sum of its proper divisors (164222550).

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

138091434 is a wasteful number, since it uses less digits than its factorization.

138091434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29102.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 138091434 is about 11751.2311695413. The cubic root of 138091434 is about 516.8790301944.

The spelling of 138091434 in words is "one hundred thirty-eight million, ninety-one thousand, four hundred thirty-four".