28485372913 has 4 divisors (see below), whose sum is σ = 29180138148. Its totient is φ = 27790607680.

The previous prime is 28485372911. The next prime is 28485372959. The reversal of 28485372913 is 31927358482.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1832524864 + 26652848049 = 42808^2 + 163257^2 .

It is a cyclic number.

It is not a de Polignac number, because 28485372913 - 2¹ = 28485372911 is a prime.

It is a super-2 number, since 2×28485372913² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28485372911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347382556 + ... + 347382637.

It is an arithmetic number, because the mean of its divisors is an integer number (7295034537).

Almost surely, 2^28485372913 is an apocalyptic number.

It is an amenable number.

28485372913 is a deficient number, since it is larger than the sum of its proper divisors (694765235).

28485372913 is an equidigital number, since it uses as much as digits as its factorization.

28485372913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694765234.

The product of its digits is 2903040, while the sum is 52.

The spelling of 28485372913 in words is "twenty-eight billion, four hundred eighty-five million, three hundred seventy-two thousand, nine hundred thirteen".