138030026 has 8 divisors (see below), whose sum is σ = 212095044. Its totient is φ = 67331680.

The previous prime is 138030019. The next prime is 138030029. The reversal of 138030026 is 620030831.

It can be written as a sum of positive squares in 2 ways, for example, as 103042801 + 34987225 = 10151^2 + 5915^2 .

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 = 138029983 and 138030010.

It is not an unprimeable number, because it can be changed into a prime (138030029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 841565 + ... + 841728.

Almost surely, 2^138030026 is an apocalyptic number.

138030026 is a deficient number, since it is larger than the sum of its proper divisors (74065018).

138030026 is a wasteful number, since it uses less digits than its factorization.

138030026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683336.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 138030026 is about 11748.6180463917. The cubic root of 138030026 is about 516.8024017060.

Adding to 138030026 its reverse (620030831), we get a palindrome (758060857).

The spelling of 138030026 in words is "one hundred thirty-eight million, thirty thousand, twenty-six".