138403338 has 16 divisors (see below), whose sum is σ = 277131456. Its totient is φ = 46080320.

The previous prime is 138403301. The next prime is 138403361. The reversal of 138403338 is 833304831.

138403338 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 138403299 and 138403308.

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, 7806 + ... + 18377.

It is an arithmetic number, because the mean of its divisors is an integer number (17320716).

Almost surely, 2^138403338 is an apocalyptic number.

138403338 is an abundant number, since it is smaller than the sum of its proper divisors (138728118).

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

138403338 is a wasteful number, since it uses less digits than its factorization.

138403338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27069.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 138403338 is about 11764.4948042829. The cubic root of 138403338 is about 517.2678918968.

The spelling of 138403338 in words is "one hundred thirty-eight million, four hundred three thousand, three hundred thirty-eight".