28321340307 has 64 divisors (see below), whose sum is σ = 41932800000. Its totient is φ = 16896781440.

The previous prime is 28321340293. The next prime is 28321340309. The reversal of 28321340307 is 70304312382.

It is not a de Polignac number, because 28321340307 - 2⁴ = 28321340291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28321340309) 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 63 ways as a sum of consecutive naturals, for example, 56755944 + ... + 56756442.

It is an arithmetic number, because the mean of its divisors is an integer number (655200000).

Almost surely, 2^28321340307 is an apocalyptic number.

28321340307 is a deficient number, since it is larger than the sum of its proper divisors (13611459693).

28321340307 is a wasteful number, since it uses less digits than its factorization.

28321340307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888.

The product of its (nonzero) digits is 24192, while the sum is 33.

Adding to 28321340307 its reverse (70304312382), we get a palindrome (98625652689).

The spelling of 28321340307 in words is "twenty-eight billion, three hundred twenty-one million, three hundred forty thousand, three hundred seven".