28131795305 has 8 divisors (see below), whose sum is σ = 35225900352. Its totient is φ = 21526938928.

The previous prime is 28131795301. The next prime is 28131795311. The reversal of 28131795305 is 50359713182.

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 28131795305 - 2² = 28131795301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28131795301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122312039 + ... + 122312268.

It is an arithmetic number, because the mean of its divisors is an integer number (4403237544).

Almost surely, 2^28131795305 is an apocalyptic number.

It is an amenable number.

28131795305 is a deficient number, since it is larger than the sum of its proper divisors (7094105047).

28131795305 is a wasteful number, since it uses less digits than its factorization.

28131795305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244624335.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 28131795305 in words is "twenty-eight billion, one hundred thirty-one million, seven hundred ninety-five thousand, three hundred five".