138332672 has 80 divisors (see below), whose sum is σ = 305819712. Its totient is φ = 62177280.

The previous prime is 138332669. The next prime is 138332681. The reversal of 138332672 is 276233831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199847 + ... + 200537.

Almost surely, 2^138332672 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 138332672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152909856).

138332672 is an abundant number, since it is smaller than the sum of its proper divisors (167487040).

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

138332672 is an equidigital number, since it uses as much as digits as its factorization.

138332672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 733 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The square root of 138332672 is about 11761.4910619360. The cubic root of 138332672 is about 517.1798413332.

The spelling of 138332672 in words is "one hundred thirty-eight million, three hundred thirty-two thousand, six hundred seventy-two".