28668508884 has 72 divisors (see below), whose sum is σ = 77462828352. Its totient is φ = 8917729920.

The previous prime is 28668508837. The next prime is 28668508901. The reversal of 28668508884 is 48880586682.

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 23 ways as a sum of consecutive naturals, for example, 388294 + ... + 456189.

It is an arithmetic number, because the mean of its divisors is an integer number (1075872616).

Almost surely, 2^28668508884 is an apocalyptic number.

It is an amenable number.

28668508884 is an abundant number, since it is smaller than the sum of its proper divisors (48794319468).

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

28668508884 is a wasteful number, since it uses less digits than its factorization.

28668508884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844557 (or 844552 counting only the distinct ones).

The product of its (nonzero) digits is 47185920, while the sum is 63.

The spelling of 28668508884 in words is "twenty-eight billion, six hundred sixty-eight million, five hundred eight thousand, eight hundred eighty-four".