28205586688 has 36 divisors (see below), whose sum is σ = 58748876928. Its totient is φ = 13489625600.

The previous prime is 28205586683. The next prime is 28205586701. The reversal of 28205586688 is 88668550282.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28205586683) 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, 2389288 + ... + 2401063.

It is an arithmetic number, because the mean of its divisors is an integer number (1631913248).

Almost surely, 2^28205586688 is an apocalyptic number.

It is an amenable number.

28205586688 is an abundant number, since it is smaller than the sum of its proper divisors (30543290240).

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

28205586688 is an equidigital number, since it uses as much as digits as its factorization.

28205586688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4790390 (or 4790376 counting only the distinct ones).

The product of its (nonzero) digits is 14745600, while the sum is 58.

The spelling of 28205586688 in words is "twenty-eight billion, two hundred five million, five hundred eighty-six thousand, six hundred eighty-eight".