138353388 has 24 divisors (see below), whose sum is σ = 323678208. Its totient is φ = 45995856.

The previous prime is 138353387. The next prime is 138353417. The reversal of 138353388 is 883353831.

It is not an unprimeable number, because it can be changed into a prime (138353387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10456 + ... + 19647.

It is an arithmetic number, because the mean of its divisors is an integer number (13486592).

Almost surely, 2^138353388 is an apocalyptic number.

It is an amenable number.

138353388 is an abundant number, since it is smaller than the sum of its proper divisors (185324820).

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

138353388 is a wasteful number, since it uses less digits than its factorization.

138353388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30493 (or 30491 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 138353388 is about 11762.3716996191. The cubic root of 138353388 is about 517.2056567887.

The spelling of 138353388 in words is "one hundred thirty-eight million, three hundred fifty-three thousand, three hundred eighty-eight".