28280448680464 has 20 divisors (see below), whose sum is σ = 54793453706320. Its totient is φ = 14140202562720.

The previous prime is 28280448680381. The next prime is 28280448680503. The reversal of 28280448680464 is 46408684408282.

It is a junction number, because it is equal to n+sod(n) for n = 28280448680396 and 28280448680405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16284979 + ... + 17937709.

It is an arithmetic number, because the mean of its divisors is an integer number (2739672685316).

Almost surely, 2^{28280448680464} is an apocalyptic number.

It is an amenable number.

28280448680464 is a deficient number, since it is larger than the sum of its proper divisors (26513005025856).

28280448680464 is a wasteful number, since it uses less digits than its factorization.

28280448680464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722198 (or 2722192 counting only the distinct ones).

The product of its (nonzero) digits is 150994944, while the sum is 64.

The spelling of 28280448680464 in words is "twenty-eight trillion, two hundred eighty billion, four hundred forty-eight million, six hundred eighty thousand, four hundred sixty-four".