28282508305 has 8 divisors (see below), whose sum is σ = 34155182952. Its totient is φ = 22481891328.

The previous prime is 28282508299. The next prime is 28282508351. The reversal of 28282508305 is 50380528282.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7700589009 + 20581919296 = 87753^2 + 143464^2 .

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 28282508305 - 2¹⁵ = 28282475537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18013552 + ... + 18015121.

It is an arithmetic number, because the mean of its divisors is an integer number (4269397869).

Almost surely, 2^28282508305 is an apocalyptic number.

It is an amenable number.

28282508305 is a deficient number, since it is larger than the sum of its proper divisors (5872674647).

28282508305 is a wasteful number, since it uses less digits than its factorization.

28282508305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36028835.

The product of its (nonzero) digits is 307200, while the sum is 43.

The spelling of 28282508305 in words is "twenty-eight billion, two hundred eighty-two million, five hundred eight thousand, three hundred five".