28442787308 has 24 divisors (see below), whose sum is σ = 55332869760. Its totient is φ = 12703973760.

The previous prime is 28442787283. The next prime is 28442787311. The reversal of 28442787308 is 80378724482.

It is a self number, because there is not a number n which added to its sum of digits gives 28442787308.

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, 8820593 + ... + 8823816.

It is an arithmetic number, because the mean of its divisors is an integer number (2305536240).

Almost surely, 2^28442787308 is an apocalyptic number.

It is an amenable number.

28442787308 is a deficient number, since it is larger than the sum of its proper divisors (26890082452).

28442787308 is a wasteful number, since it uses less digits than its factorization.

28442787308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17644457 (or 17644455 counting only the distinct ones).

The product of its (nonzero) digits is 4816896, while the sum is 53.

The spelling of 28442787308 in words is "twenty-eight billion, four hundred forty-two million, seven hundred eighty-seven thousand, three hundred eight".