28055803809 has 16 divisors (see below), whose sum is σ = 40834793664. Its totient is φ = 16992537600.

The previous prime is 28055803801. The next prime is 28055803813. The reversal of 28055803809 is 90830855082.

It is not a de Polignac number, because 28055803809 - 2³ = 28055803801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28055803801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222472 + ... + 324969.

It is an arithmetic number, because the mean of its divisors is an integer number (2552174604).

Almost surely, 2^28055803809 is an apocalyptic number.

It is an amenable number.

28055803809 is a deficient number, since it is larger than the sum of its proper divisors (12778989855).

28055803809 is a wasteful number, since it uses less digits than its factorization.

28055803809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549008.

The product of its (nonzero) digits is 691200, while the sum is 48.

The spelling of 28055803809 in words is "twenty-eight billion, fifty-five million, eight hundred three thousand, eight hundred nine".