138801232 has 40 divisors (see below), whose sum is σ = 286544160. Its totient is φ = 64944000.

The previous prime is 138801227. The next prime is 138801233. The reversal of 138801232 is 232108831.

It is a self number, because there is not a number n which added to its sum of digits gives 138801232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138801233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22482 + ... + 27982.

It is an arithmetic number, because the mean of its divisors is an integer number (7163604).

Almost surely, 2^138801232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138801232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143272080).

138801232 is an abundant number, since it is smaller than the sum of its proper divisors (147742928).

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

138801232 is a wasteful number, since it uses less digits than its factorization.

138801232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611 (or 5605 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 138801232 is about 11781.3934659700. The cubic root of 138801232 is about 517.7631132637.

The spelling of 138801232 in words is "one hundred thirty-eight million, eight hundred one thousand, two hundred thirty-two".