138813388 has 24 divisors (see below), whose sum is σ = 278852000. Its totient is φ = 59228928.

The previous prime is 138813359. The next prime is 138813431. The reversal of 138813388 is 883318831.

It is an unprimeable number.

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, 4413 + ... + 17236.

Almost surely, 2^138813388 is an apocalyptic number.

It is an amenable number.

138813388 is an abundant number, since it is smaller than the sum of its proper divisors (140038612).

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

138813388 is a wasteful number, since it uses less digits than its factorization.

138813388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21889 (or 21887 counting only the distinct ones).

The product of its digits is 110592, while the sum is 43.

The square root of 138813388 is about 11781.9093529020. The cubic root of 138813388 is about 517.7782277901.

The spelling of 138813388 in words is "one hundred thirty-eight million, eight hundred thirteen thousand, three hundred eighty-eight".