28364758805 has 18 divisors (see below), whose sum is σ = 34402634658. Its totient is φ = 22451087520.

The previous prime is 28364758801. The next prime is 28364758813. The reversal of 28364758805 is 50885746382.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7106827204 + 21257931601 = 84302^2 + 145801^2 .

It is not a de Polignac number, because 28364758805 - 2² = 28364758801 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 (28364758801) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 41048510 + ... + 41049200.

It is an arithmetic number, because the mean of its divisors is an integer number (1911257481).

Almost surely, 2^28364758805 is an apocalyptic number.

It is an amenable number.

28364758805 is a deficient number, since it is larger than the sum of its proper divisors (6037875853).

28364758805 is an frugal number, since it uses more digits than its factorization.

28364758805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 56.

The spelling of 28364758805 in words is "twenty-eight billion, three hundred sixty-four million, seven hundred fifty-eight thousand, eight hundred five".