28635634733 has 4 divisors (see below), whose sum is σ = 28636034268. Its totient is φ = 28635235200.

The previous prime is 28635634697. The next prime is 28635634747. The reversal of 28635634733 is 33743653682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33743653682 = 2 ⋅16871826841.

It can be written as a sum of positive squares in 2 ways, for example, as 27181127689 + 1454507044 = 164867^2 + 38138^2 .

It is a cyclic number.

It is not a de Polignac number, because 28635634733 - 2¹⁰ = 28635633709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28635634333) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 59366 + ... + 246567.

It is an arithmetic number, because the mean of its divisors is an integer number (7159008567).

Almost surely, 2^28635634733 is an apocalyptic number.

It is an amenable number.

28635634733 is a deficient number, since it is larger than the sum of its proper divisors (399535).

28635634733 is an equidigital number, since it uses as much as digits as its factorization.

28635634733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399534.

The product of its digits is 6531840, while the sum is 50.

The spelling of 28635634733 in words is "twenty-eight billion, six hundred thirty-five million, six hundred thirty-four thousand, seven hundred thirty-three".