138308814 has 48 divisors (see below), whose sum is σ = 343281120. Its totient is φ = 39424320.

The previous prime is 138308813. The next prime is 138308831. The reversal of 138308814 is 418803831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138308813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67152 + ... + 69180.

It is an arithmetic number, because the mean of its divisors is an integer number (7151690).

Almost surely, 2^138308814 is an apocalyptic number.

138308814 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138308814 is an abundant number, since it is smaller than the sum of its proper divisors (204972306).

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

138308814 is a wasteful number, since it uses less digits than its factorization.

138308814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585 (or 2582 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 138308814 is about 11760.4767760495. The cubic root of 138308814 is about 517.1501072487.

The spelling of 138308814 in words is "one hundred thirty-eight million, three hundred eight thousand, eight hundred fourteen".