138421232 has 20 divisors (see below), whose sum is σ = 282307080. Its totient is φ = 65567808.

The previous prime is 138421223. The next prime is 138421273. The reversal of 138421232 is 232124831.

138421232 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 3 ways as a sum of consecutive naturals, for example, 227363 + ... + 227970.

It is an arithmetic number, because the mean of its divisors is an integer number (14115354).

Almost surely, 2^138421232 is an apocalyptic number.

It is an amenable number.

138421232 is an abundant number, since it is smaller than the sum of its proper divisors (143885848).

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

138421232 is a wasteful number, since it uses less digits than its factorization.

138421232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455360 (or 455354 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 138421232 is about 11765.2552883480. The cubic root of 138421232 is about 517.2901832493.

The spelling of 138421232 in words is "one hundred thirty-eight million, four hundred twenty-one thousand, two hundred thirty-two".