28587307884 has 12 divisors (see below), whose sum is σ = 66703718424. Its totient is φ = 9529102624.

The previous prime is 28587307883. The next prime is 28587307901. The reversal of 28587307884 is 48870378582.

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

It is not an unprimeable number, because it can be changed into a prime (28587307883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1191137817 + ... + 1191137840.

It is an arithmetic number, because the mean of its divisors is an integer number (5558643202).

Almost surely, 2^28587307884 is an apocalyptic number.

It is an amenable number.

28587307884 is an abundant number, since it is smaller than the sum of its proper divisors (38116410540).

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

28587307884 is a wasteful number, since it uses less digits than its factorization.

28587307884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382275664 (or 2382275662 counting only the distinct ones).

The product of its (nonzero) digits is 24084480, while the sum is 60.

The spelling of 28587307884 in words is "twenty-eight billion, five hundred eighty-seven million, three hundred seven thousand, eight hundred eighty-four".