28565587668 has 24 divisors (see below), whose sum is σ = 66656903040. Its totient is φ = 9521310400.

The previous prime is 28565587637. The next prime is 28565587693. The reversal of 28565587668 is 86678556582.

It is a junction number, because it is equal to n+sod(n) for n = 28565587599 and 28565587608.

It is a congruent number.

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, 183493 + ... + 301331.

It is an arithmetic number, because the mean of its divisors is an integer number (2777370960).

Almost surely, 2^28565587668 is an apocalyptic number.

It is an amenable number.

28565587668 is an abundant number, since it is smaller than the sum of its proper divisors (38091315372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28565587668 is a wasteful number, since it uses less digits than its factorization.

28565587668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138047 (or 138045 counting only the distinct ones).

The product of its digits is 193536000, while the sum is 66.

The spelling of 28565587668 in words is "twenty-eight billion, five hundred sixty-five million, five hundred eighty-seven thousand, six hundred sixty-eight".