2800005305 has 4 divisors (see below), whose sum is σ = 3360006372. Its totient is φ = 2240004240.

The previous prime is 2800005293. The next prime is 2800005323. The reversal of 2800005305 is 5035000082.

2800005305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 604520569 + 2195484736 = 24587^2 + 46856^2 .

It is not a de Polignac number, because 2800005305 - 2¹⁰ = 2800004281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280000526 + ... + 280000535.

It is an arithmetic number, because the mean of its divisors is an integer number (840001593).

Almost surely, 2^2800005305 is an apocalyptic number.

It is an amenable number.

2800005305 is a deficient number, since it is larger than the sum of its proper divisors (560001067).

2800005305 is an equidigital number, since it uses as much as digits as its factorization.

2800005305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560001066.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2800005305 is about 52915.0763488063. The cubic root of 2800005305 is about 1409.4606365534.

Adding to 2800005305 its reverse (5035000082), we get a palindrome (7835005387).

The spelling of 2800005305 in words is "two billion, eight hundred million, five thousand, three hundred five".