2808280885 has 4 divisors (see below), whose sum is σ = 3369937068. Its totient is φ = 2246624704.

The previous prime is 2808280877. The next prime is 2808280897. The reversal of 2808280885 is 5880828082.

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 668015716 + 2140265169 = 25846^2 + 46263^2 .

It is a cyclic number.

It is not a de Polignac number, because 2808280885 - 2³ = 2808280877 is a prime.

It is a Smith number, since the sum of its digits (49) 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 a congruent number.

It is an unprimeable number.

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, 280828084 + ... + 280828093.

It is an arithmetic number, because the mean of its divisors is an integer number (842484267).

Almost surely, 2^2808280885 is an apocalyptic number.

It is an amenable number.

2808280885 is a deficient number, since it is larger than the sum of its proper divisors (561656183).

2808280885 is an equidigital number, since it uses as much as digits as its factorization.

2808280885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561656182.

The product of its (nonzero) digits is 655360, while the sum is 49.

The square root of 2808280885 is about 52993.2154619815. The cubic root of 2808280885 is about 1410.8478519931.

The spelling of 2808280885 in words is "two billion, eight hundred eight million, two hundred eighty thousand, eight hundred eighty-five".