28672143664 has 20 divisors (see below), whose sum is σ = 55589683104. Its totient is φ = 14326419008.

The previous prime is 28672143649. The next prime is 28672143671. The reversal of 28672143664 is 46634127682.

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, 578767 + ... + 626350.

Almost surely, 2^28672143664 is an apocalyptic number.

It is an amenable number.

28672143664 is a deficient number, since it is larger than the sum of its proper divisors (26917539440).

28672143664 is a wasteful number, since it uses less digits than its factorization.

28672143664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206612 (or 1206606 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 49.

The spelling of 28672143664 in words is "twenty-eight billion, six hundred seventy-two million, one hundred forty-three thousand, six hundred sixty-four".