28840478866 has 16 divisors (see below), whose sum is σ = 43325339040. Its totient is φ = 14398716960.

The previous prime is 28840478819. The next prime is 28840478893. The reversal of 28840478866 is 66887404882.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5351025 + ... + 5356411.

It is an arithmetic number, because the mean of its divisors is an integer number (2707833690).

Almost surely, 2^28840478866 is an apocalyptic number.

28840478866 is a deficient number, since it is larger than the sum of its proper divisors (14484860174).

28840478866 is a wasteful number, since it uses less digits than its factorization.

28840478866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8889.

The product of its (nonzero) digits is 33030144, while the sum is 61.

The spelling of 28840478866 in words is "twenty-eight billion, eight hundred forty million, four hundred seventy-eight thousand, eight hundred sixty-six".