2808520465 has 4 divisors (see below), whose sum is σ = 3370224564. Its totient is φ = 2246816368.

The previous prime is 2808520441. The next prime is 2808520469. The reversal of 2808520465 is 5640258082.

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 1915287696 + 893232769 = 43764^2 + 29887^2 .

It is a cyclic number.

It is not a de Polignac number, because 2808520465 - 2⁹ = 2808519953 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2808520469) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 280852042 + ... + 280852051.

It is an arithmetic number, because the mean of its divisors is an integer number (842556141).

Almost surely, 2^2808520465 is an apocalyptic number.

It is an amenable number.

2808520465 is a deficient number, since it is larger than the sum of its proper divisors (561704099).

2808520465 is an equidigital number, since it uses as much as digits as its factorization.

2808520465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561704098.

The product of its (nonzero) digits is 153600, while the sum is 40.

The square root of 2808520465 is about 52995.4758918155. The cubic root of 2808520465 is about 1410.8879715930.

The spelling of 2808520465 in words is "two billion, eight hundred eight million, five hundred twenty thousand, four hundred sixty-five".