28988087530728 has 64 divisors (see below), whose sum is σ = 73640604280320. Its totient is φ = 9507198814400.

The previous prime is 28988087530679. The next prime is 28988087530747. The reversal of 28988087530728 is 82703578088982.

It is a self number, because there is not a number n which added to its sum of digits gives 28988087530728.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16486950 + ... + 18160277.

It is an arithmetic number, because the mean of its divisors is an integer number (1150634441880).

Almost surely, 2^{28988087530728} is an apocalyptic number.

It is an amenable number.

28988087530728 is an abundant number, since it is smaller than the sum of its proper divisors (44652516749592).

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

28988087530728 is a wasteful number, since it uses less digits than its factorization.

28988087530728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34647798 (or 34647794 counting only the distinct ones).

The product of its (nonzero) digits is 867041280, while the sum is 75.

The spelling of 28988087530728 in words is "twenty-eight trillion, nine hundred eighty-eight billion, eighty-seven million, five hundred thirty thousand, seven hundred twenty-eight".