28090841808 has 20 divisors (see below), whose sum is σ = 72568008128. Its totient is φ = 9363613920.

The previous prime is 28090841773. The next prime is 28090841809. The reversal of 28090841808 is 80814809082.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 585225871 = 28090841808 / (2 + 8 + 0 + 9 + 0 + 8 + 4 + 1 + 8 + 0 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28090841809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292612888 + ... + 292612983.

Almost surely, 2^28090841808 is an apocalyptic number.

It is an amenable number.

28090841808 is an abundant number, since it is smaller than the sum of its proper divisors (44477166320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28090841808 is a wasteful number, since it uses less digits than its factorization.

28090841808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585225882 (or 585225876 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 48.

The spelling of 28090841808 in words is "twenty-eight billion, ninety million, eight hundred forty-one thousand, eight hundred eight".