138939338 has 8 divisors (see below), whose sum is σ = 209319780. Its totient is φ = 69166080.

The previous prime is 138939313. The next prime is 138939347. The reversal of 138939338 is 833939831.

138939338 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 132319009 + 6620329 = 11503^2 + 2573^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 138939292 and 138939301.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151223 + ... + 152138.

Almost surely, 2^138939338 is an apocalyptic number.

138939338 is a deficient number, since it is larger than the sum of its proper divisors (70380442).

138939338 is a wasteful number, since it uses less digits than its factorization.

138939338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303592.

The product of its digits is 419904, while the sum is 47.

The square root of 138939338 is about 11787.2531999614. The cubic root of 138939338 is about 517.9347795824.

The spelling of 138939338 in words is "one hundred thirty-eight million, nine hundred thirty-nine thousand, three hundred thirty-eight".