138048026 has 4 divisors (see below), whose sum is σ = 207072042. Its totient is φ = 69024012.

The previous prime is 138048013. The next prime is 138048049. The reversal of 138048026 is 620840831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 138039001 + 9025 = 11749^2 + 95^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138047983 and 138048001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34512005 + ... + 34512008.

Almost surely, 2^138048026 is an apocalyptic number.

138048026 is a deficient number, since it is larger than the sum of its proper divisors (69024016).

138048026 is an equidigital number, since it uses as much as digits as its factorization.

138048026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69024015.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 138048026 is about 11749.3840689629. The cubic root of 138048026 is about 516.8248655113.

Adding to 138048026 its reverse (620840831), we get a palindrome (758888857).

The spelling of 138048026 in words is "one hundred thirty-eight million, forty-eight thousand, twenty-six".