2891885684 has 18 divisors (see below), whose sum is σ = 5236359030. Its totient is φ = 1395803136.

The previous prime is 2891885663. The next prime is 2891885699. The reversal of 2891885684 is 4865881982.

It can be written as a sum of positive squares in 3 ways, for example, as 177475684 + 2714410000 = 13322^2 + 52100^2 .

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 576692 + ... + 581684.

It is an arithmetic number, because the mean of its divisors is an integer number (290908835).

Almost surely, 2^2891885684 is an apocalyptic number.

It is an amenable number.

2891885684 is a deficient number, since it is larger than the sum of its proper divisors (2344473346).

2891885684 is an frugal number, since it uses more digits than its factorization.

2891885684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10019 (or 5024 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 59.

The square root of 2891885684 is about 53776.2557640452. The cubic root of 2891885684 is about 1424.7118627845.

The spelling of 2891885684 in words is "two billion, eight hundred ninety-one million, eight hundred eighty-five thousand, six hundred eighty-four".