138144294 has 24 divisors (see below), whose sum is σ = 306275112. Its totient is φ = 44976960.

The previous prime is 138144271. The next prime is 138144299. The reversal of 138144294 is 492441831.

It is a happy number.

138144294 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138144299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88467 + ... + 90014.

It is an arithmetic number, because the mean of its divisors is an integer number (12761463).

Almost surely, 2^138144294 is an apocalyptic number.

138144294 is an abundant number, since it is smaller than the sum of its proper divisors (168130818).

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

138144294 is a wasteful number, since it uses less digits than its factorization.

138144294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178532 (or 178529 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 138144294 is about 11753.4800803847. The cubic root of 138144294 is about 516.9449737973.

The spelling of 138144294 in words is "one hundred thirty-eight million, one hundred forty-four thousand, two hundred ninety-four".