28688760808 has 8 divisors (see below), whose sum is σ = 53791426530. Its totient is φ = 14344380400.

The previous prime is 28688760787. The next prime is 28688760833. The reversal of 28688760808 is 80806788682.

It can be written as a sum of positive squares in only one way, i.e., 17097654564 + 11591106244 = 130758^2 + 107662^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1793047543 + ... + 1793047558.

Almost surely, 2^28688760808 is an apocalyptic number.

It is an amenable number.

28688760808 is a deficient number, since it is larger than the sum of its proper divisors (25102665722).

28688760808 is a wasteful number, since it uses less digits than its factorization.

28688760808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3586095107 (or 3586095103 counting only the distinct ones).

The product of its (nonzero) digits is 16515072, while the sum is 61.

The spelling of 28688760808 in words is "twenty-eight billion, six hundred eighty-eight million, seven hundred sixty thousand, eight hundred eight".