28208808801 has 6 divisors (see below), whose sum is σ = 40746057170. Its totient is φ = 18805872528.

The previous prime is 28208808721. The next prime is 28208808853. The reversal of 28208808801 is 10880880282.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20327630625 + 7881178176 = 142575^2 + 88776^2 .

It is not a de Polignac number, because 28208808801 - 2²⁷ = 28074591073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28208808601) 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 5 ways as a sum of consecutive naturals, for example, 1567156036 + ... + 1567156053.

Almost surely, 2^28208808801 is an apocalyptic number.

It is an amenable number.

28208808801 is a deficient number, since it is larger than the sum of its proper divisors (12537248369).

28208808801 is a wasteful number, since it uses less digits than its factorization.

28208808801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3134312095 (or 3134312092 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 45.

The spelling of 28208808801 in words is "twenty-eight billion, two hundred eight million, eight hundred eight thousand, eight hundred one".