28343512816 has 20 divisors (see below), whose sum is σ = 54946830400. Its totient is φ = 14163685632.

The previous prime is 28343512781. The next prime is 28343512829. The reversal of 28343512816 is 61821534382.

It is a congruent number.

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, 475401 + ... + 531688.

It is an arithmetic number, because the mean of its divisors is an integer number (2747341520).

Almost surely, 2^28343512816 is an apocalyptic number.

It is an amenable number.

28343512816 is a deficient number, since it is larger than the sum of its proper divisors (26603317584).

28343512816 is a wasteful number, since it uses less digits than its factorization.

28343512816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008856 (or 1008850 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The spelling of 28343512816 in words is "twenty-eight billion, three hundred forty-three million, five hundred twelve thousand, eight hundred sixteen".