28080646648 has 16 divisors (see below), whose sum is σ = 55748342880. Its totient is φ = 13214421888.

The previous prime is 28080646639. The next prime is 28080646651. The reversal of 28080646648 is 84664608082.

It is a junction number, because it is equal to n+sod(n) for n = 28080646595 and 28080646604.

It is a congruent number.

It is an unprimeable number.

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, 103237536 + ... + 103237807.

It is an arithmetic number, because the mean of its divisors is an integer number (3484271430).

Almost surely, 2^28080646648 is an apocalyptic number.

It is an amenable number.

28080646648 is a deficient number, since it is larger than the sum of its proper divisors (27667696232).

28080646648 is a wasteful number, since it uses less digits than its factorization.

28080646648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206475366 (or 206475362 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 52.

The spelling of 28080646648 in words is "twenty-eight billion, eighty million, six hundred forty-six thousand, six hundred forty-eight".