138788338 has 8 divisors (see below), whose sum is σ = 224196588. Its totient is φ = 64056144.

The previous prime is 138788327. The next prime is 138788339. The reversal of 138788338 is 833887831.

It can be written as a sum of positive squares in 2 ways, for example, as 137053849 + 1734489 = 11707^2 + 1317^2 .

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 = 138788291 and 138788300.

It is not an unprimeable number, because it can be changed into a prime (138788339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2668981 + ... + 2669032.

Almost surely, 2^138788338 is an apocalyptic number.

138788338 is a deficient number, since it is larger than the sum of its proper divisors (85408250).

138788338 is a wasteful number, since it uses less digits than its factorization.

138788338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5338028.

The product of its digits is 774144, while the sum is 49.

The square root of 138788338 is about 11780.8462344604. The cubic root of 138788338 is about 517.7470801583.

The spelling of 138788338 in words is "one hundred thirty-eight million, seven hundred eighty-eight thousand, three hundred thirty-eight".