28849461218 has 6 divisors (see below), whose sum is σ = 43274552139. Its totient is φ = 14424610506.

The previous prime is 28849461133. The next prime is 28849461287. The reversal of 28849461218 is 81216494882.

It can be written as a sum of positive squares in only one way, i.e., 14424730609 + 14424730609 = 120103^2 + 120103^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=120103.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28849461218.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 180155 + ... + 300257.

Almost surely, 2^28849461218 is an apocalyptic number.

28849461218 is a deficient number, since it is larger than the sum of its proper divisors (14425090921).

28849461218 is an frugal number, since it uses more digits than its factorization.

28849461218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240208 (or 120105 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 53.

The spelling of 28849461218 in words is "twenty-eight billion, eight hundred forty-nine million, four hundred sixty-one thousand, two hundred eighteen".