28321218313 has 8 divisors (see below), whose sum is σ = 28548126720. Its totient is φ = 28094371200.

The previous prime is 28321218271. The next prime is 28321218353. The reversal of 28321218313 is 31381212382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28321218313 - 2²⁵ = 28287663881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28321218353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1529913 + ... + 1548313.

It is an arithmetic number, because the mean of its divisors is an integer number (3568515840).

Almost surely, 2^28321218313 is an apocalyptic number.

It is an amenable number.

28321218313 is a deficient number, since it is larger than the sum of its proper divisors (226908407).

28321218313 is a wasteful number, since it uses less digits than its factorization.

28321218313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30647.

The product of its digits is 13824, while the sum is 34.

The spelling of 28321218313 in words is "twenty-eight billion, three hundred twenty-one million, two hundred eighteen thousand, three hundred thirteen".