138332768 has 48 divisors (see below), whose sum is σ = 327640320. Its totient is φ = 56163456.

The previous prime is 138332693. The next prime is 138332783. The reversal of 138332768 is 867233831.

It is a congruent number.

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, 11996 + ... + 20507.

It is an arithmetic number, because the mean of its divisors is an integer number (6825840).

Almost surely, 2^138332768 is an apocalyptic number.

It is an amenable number.

138332768 is an abundant number, since it is smaller than the sum of its proper divisors (189307552).

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

138332768 is a wasteful number, since it uses less digits than its factorization.

138332768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32539 (or 32531 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 138332768 is about 11761.4951430505. The cubic root of 138332768 is about 517.1799609705.

The spelling of 138332768 in words is "one hundred thirty-eight million, three hundred thirty-two thousand, seven hundred sixty-eight".