28805652317 has 8 divisors (see below), whose sum is σ = 31095162840. Its totient is φ = 26526669120.

The previous prime is 28805652307. The next prime is 28805652319. The reversal of 28805652317 is 71325650882.

It can be written as a sum of positive squares in 4 ways, for example, as 7202237956 + 21603414361 = 84866^2 + 146981^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28805652317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28805652319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2626142 + ... + 2637087.

It is an arithmetic number, because the mean of its divisors is an integer number (3886895355).

Almost surely, 2^28805652317 is an apocalyptic number.

It is an amenable number.

28805652317 is a deficient number, since it is larger than the sum of its proper divisors (2289510523).

28805652317 is a wasteful number, since it uses less digits than its factorization.

28805652317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5263663.

The product of its (nonzero) digits is 806400, while the sum is 47.

It can be divided in two parts, 2880565 and 2317, that added together give a palindrome (2882882).

The spelling of 28805652317 in words is "twenty-eight billion, eight hundred five million, six hundred fifty-two thousand, three hundred seventeen".