28728583868 has 12 divisors (see below), whose sum is σ = 50277988992. Its totient is φ = 14363444160.

The previous prime is 28728583783. The next prime is 28728583879. The reversal of 28728583868 is 86838582782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132380 + ... + 273827.

It is an arithmetic number, because the mean of its divisors is an integer number (4189832416).

Almost surely, 2^28728583868 is an apocalyptic number.

It is an amenable number.

28728583868 is a deficient number, since it is larger than the sum of its proper divisors (21549405124).

28728583868 is a wasteful number, since it uses less digits than its factorization.

28728583868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423892 (or 423890 counting only the distinct ones).

The product of its digits is 82575360, while the sum is 65.

The spelling of 28728583868 in words is "twenty-eight billion, seven hundred twenty-eight million, five hundred eighty-three thousand, eight hundred sixty-eight".