28055803808 has 24 divisors (see below), whose sum is σ = 55259350020. Its totient is φ = 14021683200.

The previous prime is 28055803801. The next prime is 28055803813. The reversal of 28055803808 is 80830855082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20502803344 + 7553000464 = 143188^2 + 86908^2 .

It is not an unprimeable number, because it can be changed into a prime (28055803801) 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, 120593 + ... + 265808.

Almost surely, 2^28055803808 is an apocalyptic number.

It is an amenable number.

28055803808 is a deficient number, since it is larger than the sum of its proper divisors (27203546212).

28055803808 is a wasteful number, since it uses less digits than its factorization.

28055803808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388680 (or 388672 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 47.

The spelling of 28055803808 in words is "twenty-eight billion, fifty-five million, eight hundred three thousand, eight hundred eight".