28321075306 has 8 divisors (see below), whose sum is σ = 42514573860. Its totient is φ = 14149550688.

The previous prime is 28321075247. The next prime is 28321075331. The reversal of 28321075306 is 60357012382.

It can be written as a sum of positive squares in 2 ways, for example, as 28277449281 + 43626025 = 168159^2 + 6605^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5490261 + ... + 5495416.

Almost surely, 2^28321075306 is an apocalyptic number.

28321075306 is a deficient number, since it is larger than the sum of its proper divisors (14193498554).

28321075306 is a wasteful number, since it uses less digits than its factorization.

28321075306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10986968.

The product of its (nonzero) digits is 60480, while the sum is 37.

Adding to 28321075306 its reverse (60357012382), we get a palindrome (88678087688).

The spelling of 28321075306 in words is "twenty-eight billion, three hundred twenty-one million, seventy-five thousand, three hundred six".