2805452857 has 4 divisors (see below), whose sum is σ = 2806248676. Its totient is φ = 2804657040.

The previous prime is 2805452851. The next prime is 2805452893. The reversal of 2805452857 is 7582545082.

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 1388382121 + 1417070736 = 37261^2 + 37644^2 .

It is a cyclic number.

It is not a de Polignac number, because 2805452857 - 2¹⁹ = 2804928569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2805452851) 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, 392598 + ... + 399679.

It is an arithmetic number, because the mean of its divisors is an integer number (701562169).

Almost surely, 2^2805452857 is an apocalyptic number.

It is an amenable number.

2805452857 is a deficient number, since it is larger than the sum of its proper divisors (795819).

2805452857 is an equidigital number, since it uses as much as digits as its factorization.

2805452857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795818.

The product of its (nonzero) digits is 896000, while the sum is 46.

The square root of 2805452857 is about 52966.5258158396. The cubic root of 2805452857 is about 1410.3741034061.

The spelling of 2805452857 in words is "two billion, eight hundred five million, four hundred fifty-two thousand, eight hundred fifty-seven".