138038 has 4 divisors (see below), whose sum is σ = 207060. Its totient is φ = 69018.

The previous prime is 138007. The next prime is 138041. The reversal of 138038 is 830831.

138038 is nontrivially palindromic in base 13.

138038 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 830831 = 31 ⋅26801.

It is a congruent number.

It is an unprimeable number.

138038 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34508 + ... + 34511.

It is an arithmetic number, because the mean of its divisors is an integer number (51765).

2¹³⁸⁰³⁸ is an apocalyptic number.

138038 is a deficient number, since it is larger than the sum of its proper divisors (69022).

138038 is an equidigital number, since it uses as much as digits as its factorization.

138038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69021.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 138038 is about 371.5346551804. The cubic root of 138038 is about 51.6812353413.

Adding to 138038 its reverse (830831), we get a palindrome (968869).

The spelling of 138038 in words is "one hundred thirty-eight thousand, thirty-eight".