28080243688 has 32 divisors (see below), whose sum is σ = 60734318400. Its totient is φ = 11921916672.

The previous prime is 28080243677. The next prime is 28080243767. The reversal of 28080243688 is 88634208082.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2337153 + ... + 2349136.

It is an arithmetic number, because the mean of its divisors is an integer number (1897947450).

Almost surely, 2^28080243688 is an apocalyptic number.

28080243688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28080243688 is an abundant number, since it is smaller than the sum of its proper divisors (32654074712).

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

28080243688 is a wasteful number, since it uses less digits than its factorization.

28080243688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4686409 (or 4686405 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 49.

The spelling of 28080243688 in words is "twenty-eight billion, eighty million, two hundred forty-three thousand, six hundred eighty-eight".