138331308 has 24 divisors (see below), whose sum is σ = 331497712. Its totient is φ = 44864064.

The previous prime is 138331273. The next prime is 138331309. The reversal of 138331308 is 803133831.

It is not an unprimeable number, because it can be changed into a prime (138331309) 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 7 ways as a sum of consecutive naturals, for example, 155335 + ... + 156222.

Almost surely, 2^138331308 is an apocalyptic number.

It is an amenable number.

138331308 is an abundant number, since it is smaller than the sum of its proper divisors (193166404).

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

138331308 is a wasteful number, since it uses less digits than its factorization.

138331308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311601 (or 311599 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 138331308 is about 11761.4330759478. The cubic root of 138331308 is about 517.1781414802.

The spelling of 138331308 in words is "one hundred thirty-eight million, three hundred thirty-one thousand, three hundred eight".