28801686880 has 24 divisors (see below), whose sum is σ = 68043985632. Its totient is φ = 11520674688.

The previous prime is 28801686871. The next prime is 28801686887. The reversal of 28801686880 is 8868610882.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28801686887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90005112 + ... + 90005431.

It is an arithmetic number, because the mean of its divisors is an integer number (2835166068).

Almost surely, 2^28801686880 is an apocalyptic number.

28801686880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28801686880 is an abundant number, since it is smaller than the sum of its proper divisors (39242298752).

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

28801686880 is a wasteful number, since it uses less digits than its factorization.

28801686880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180010558 (or 180010550 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 55.

The spelling of 28801686880 in words is "twenty-eight billion, eight hundred one million, six hundred eighty-six thousand, eight hundred eighty".