28526638385 has 32 divisors (see below), whose sum is σ = 40297500672. Its totient is φ = 18979531200.

The previous prime is 28526638373. The next prime is 28526638417. The reversal of 28526638385 is 58383662582.

It is not a de Polignac number, because 28526638385 - 2¹⁰ = 28526637361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28526638385.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164492 + ... + 290018.

It is an arithmetic number, because the mean of its divisors is an integer number (1259296896).

Almost surely, 2^28526638385 is an apocalyptic number.

It is an amenable number.

28526638385 is a deficient number, since it is larger than the sum of its proper divisors (11770862287).

28526638385 is a wasteful number, since it uses less digits than its factorization.

28526638385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125733.

The product of its digits is 16588800, while the sum is 56.

The spelling of 28526638385 in words is "twenty-eight billion, five hundred twenty-six million, six hundred thirty-eight thousand, three hundred eighty-five".