28800805265 has 8 divisors (see below), whose sum is σ = 35403916968. Its totient is φ = 22478677120.

The previous prime is 28800805259. The next prime is 28800805331. The reversal of 28800805265 is 56250800882.

It is a Cunningham number, because it is equal to 169708²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 28800805264 = 1^2 + 169708^2 .

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

It is not a de Polignac number, because 28800805265 - 2⁴ = 28800805249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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, 70245662 + ... + 70246071.

It is an arithmetic number, because the mean of its divisors is an integer number (4425489621).

Almost surely, 2^28800805265 is an apocalyptic number.

It is an amenable number.

28800805265 is a deficient number, since it is larger than the sum of its proper divisors (6603111703).

28800805265 is a wasteful number, since it uses less digits than its factorization.

28800805265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140491779.

The product of its (nonzero) digits is 307200, while the sum is 44.

The spelling of 28800805265 in words is "twenty-eight billion, eight hundred million, eight hundred five thousand, two hundred sixty-five".