138026 has 8 divisors (see below), whose sum is σ = 236640. Its totient is φ = 59148.

The previous prime is 138007. The next prime is 138041. The reversal of 138026 is 620831.

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 = 137989 and 138007.

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, 4916 + ... + 4943.

It is an arithmetic number, because the mean of its divisors is an integer number (29580).

2¹³⁸⁰²⁶ is an apocalyptic number.

138026 is a deficient number, since it is larger than the sum of its proper divisors (98614).

138026 is an equidigital number, since it uses as much as digits as its factorization.

138026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9868.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 138026 is about 371.5185055956. The cubic root of 138026 is about 51.6797377034.

Adding to 138026 its reverse (620831), we get a palindrome (758857).

The spelling of 138026 in words is "one hundred thirty-eight thousand, twenty-six".