28909660018884 has 12 divisors (see below), whose sum is σ = 67455873377424. Its totient is φ = 9636553339624.

The previous prime is 28909660018849. The next prime is 28909660018891. The reversal of 28909660018884 is 48881006690982.

It is a tau number, because it is divible by the number of its divisors (12).

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, 1204569167442 + ... + 1204569167465.

It is an arithmetic number, because the mean of its divisors is an integer number (5621322781452).

Almost surely, 2^{28909660018884} is an apocalyptic number.

It is an amenable number.

28909660018884 is an abundant number, since it is smaller than the sum of its proper divisors (38546213358540).

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

28909660018884 is a wasteful number, since it uses less digits than its factorization.

28909660018884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409138334914 (or 2409138334912 counting only the distinct ones).

The product of its (nonzero) digits is 95551488, while the sum is 69.

The spelling of 28909660018884 in words is "twenty-eight trillion, nine hundred nine billion, six hundred sixty million, eighteen thousand, eight hundred eighty-four".