28004745668 has 12 divisors (see below), whose sum is σ = 49011972240. Its totient is φ = 14001325032.

The previous prime is 28004745649. The next prime is 28004745707. The reversal of 28004745668 is 86654740082.

It is a happy number.

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, 200198 + ... + 309981.

It is an arithmetic number, because the mean of its divisors is an integer number (4084331020).

Almost surely, 2^28004745668 is an apocalyptic number.

It is an amenable number.

28004745668 is a deficient number, since it is larger than the sum of its proper divisors (21007226572).

28004745668 is a wasteful number, since it uses less digits than its factorization.

28004745668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523906 (or 523904 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 50.

The spelling of 28004745668 in words is "twenty-eight billion, four million, seven hundred forty-five thousand, six hundred sixty-eight".