138238632 has 48 divisors (see below), whose sum is σ = 427883040. Its totient is φ = 39496608.

The previous prime is 138238631. The next prime is 138238651. The reversal of 138238632 is 236832831.

138238632 is a `hidden beast` number, since 13 + 8 + 2 + 3 + 8 + 632 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (138238631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136638 + ... + 137645.

It is an arithmetic number, because the mean of its divisors is an integer number (8914230).

Almost surely, 2^138238632 is an apocalyptic number.

138238632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138238632 is an abundant number, since it is smaller than the sum of its proper divisors (289644408).

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

138238632 is a wasteful number, since it uses less digits than its factorization.

138238632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274302 (or 274295 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 138238632 is about 11757.4925898339. The cubic root of 138238632 is about 517.0626200079.

The spelling of 138238632 in words is "one hundred thirty-eight million, two hundred thirty-eight thousand, six hundred thirty-two".