128726338 has 8 divisors (see below), whose sum is σ = 207942588. Its totient is φ = 59412144.

The previous prime is 128726333. The next prime is 128726369. The reversal of 128726338 is 833627821.

It can be written as a sum of positive squares in 2 ways, for example, as 117657409 + 11068929 = 10847^2 + 3327^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 128726338.

It is not an unprimeable number, because it can be changed into a prime (128726333) 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, 2475481 + ... + 2475532.

Almost surely, 2^128726338 is an apocalyptic number.

128726338 is a deficient number, since it is larger than the sum of its proper divisors (79216250).

128726338 is a wasteful number, since it uses less digits than its factorization.

128726338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4951028.

The product of its digits is 96768, while the sum is 40.

The square root of 128726338 is about 11345.7629977009. The cubic root of 128726338 is about 504.9198814178.

The spelling of 128726338 in words is "one hundred twenty-eight million, seven hundred twenty-six thousand, three hundred thirty-eight".