138930026 has 8 divisors (see below), whose sum is σ = 212829120. Its totient is φ = 67986988.

The previous prime is 138930019. The next prime is 138930049. The reversal of 138930026 is 620039831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×138930026³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138929974 and 138930001.

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, 738896 + ... + 739083.

It is an arithmetic number, because the mean of its divisors is an integer number (26603640).

Almost surely, 2^138930026 is an apocalyptic number.

138930026 is a deficient number, since it is larger than the sum of its proper divisors (73899094).

138930026 is a wasteful number, since it uses less digits than its factorization.

138930026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478028.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 138930026 is about 11786.8581903746. The cubic root of 138930026 is about 517.9232083061.

Adding to 138930026 its reverse (620039831), we get a palindrome (758969857).

The spelling of 138930026 in words is "one hundred thirty-eight million, nine hundred thirty thousand, twenty-six".