138230832 has 30 divisors (see below), whose sum is σ = 357306868. Its totient is φ = 46049792.

The previous prime is 138230831. The next prime is 138230861. The reversal of 138230832 is 238032831.

It is a self number, because there is not a number n which added to its sum of digits gives 138230832.

It is not an unprimeable number, because it can be changed into a prime (138230831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80608 + ... + 82304.

Almost surely, 2^138230832 is an apocalyptic number.

138230832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138230832 is an abundant number, since it is smaller than the sum of its proper divisors (219076036).

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

138230832 is an frugal number, since it uses more digits than its factorization.

138230832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3405 (or 1702 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 138230832 is about 11757.1608817775. The cubic root of 138230832 is about 517.0528948820.

Multiplying 138230832 by its product of nonzero digits (6912), we get a square (955451510784 = 977472²).

The spelling of 138230832 in words is "one hundred thirty-eight million, two hundred thirty thousand, eight hundred thirty-two".