28717301717 has 16 divisors (see below), whose sum is σ = 31172935920. Its totient is φ = 26297160192.

The previous prime is 28717301677. The next prime is 28717301749. The reversal of 28717301717 is 71710371782.

It can be written as a sum of positive squares in 8 ways, for example, as 307862116 + 28409439601 = 17546^2 + 168551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28717301717 is a prime.

It is a super-2 number, since 2×28717301717² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28717301617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3181703 + ... + 3190715.

It is an arithmetic number, because the mean of its divisors is an integer number (1948308495).

Almost surely, 2^28717301717 is an apocalyptic number.

It is an amenable number.

28717301717 is a deficient number, since it is larger than the sum of its proper divisors (2455634203).

28717301717 is a wasteful number, since it uses less digits than its factorization.

28717301717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10952.

The product of its (nonzero) digits is 115248, while the sum is 44.

The spelling of 28717301717 in words is "twenty-eight billion, seven hundred seventeen million, three hundred one thousand, seven hundred seventeen".