138430422 has 144 divisors (see below), whose sum is σ = 362063520. Its totient is φ = 37914624.

The previous prime is 138430403. The next prime is 138430423. The reversal of 138430422 is 224034831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138430423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1555354 + ... + 1555442.

It is an arithmetic number, because the mean of its divisors is an integer number (2514330).

Almost surely, 2^138430422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138430422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181031760).

138430422 is an abundant number, since it is smaller than the sum of its proper divisors (223633098).

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

138430422 is a wasteful number, since it uses less digits than its factorization.

138430422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 138430422 is about 11765.6458386270. The cubic root of 138430422 is about 517.3016308948.

The spelling of 138430422 in words is "one hundred thirty-eight million, four hundred thirty thousand, four hundred twenty-two".