2889645449 has 4 divisors (see below), whose sum is σ = 2891273364. Its totient is φ = 2888017536.

The previous prime is 2889645433. The next prime is 2889645487. The reversal of 2889645449 is 9445469882.

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 761484025 + 2128161424 = 27595^2 + 46132^2 .

It is a cyclic number.

It is not a de Polignac number, because 2889645449 - 2⁴ = 2889645433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2889645049) 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, 811292 + ... + 814845.

It is an arithmetic number, because the mean of its divisors is an integer number (722818341).

Almost surely, 2^2889645449 is an apocalyptic number.

It is an amenable number.

2889645449 is a deficient number, since it is larger than the sum of its proper divisors (1627915).

2889645449 is a wasteful number, since it uses less digits than its factorization.

2889645449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627914.

The product of its digits is 19906560, while the sum is 59.

The square root of 2889645449 is about 53755.4225078736. The cubic root of 2889645449 is about 1424.3438775269.

The spelling of 2889645449 in words is "two billion, eight hundred eighty-nine million, six hundred forty-five thousand, four hundred forty-nine".