2891742684 has 24 divisors (see below), whose sum is σ = 6758317440. Its totient is φ = 962354544.

The previous prime is 2891742683. The next prime is 2891742767. The reversal of 2891742684 is 4862471982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2891742683) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 187224 + ... + 202079.

It is an arithmetic number, because the mean of its divisors is an integer number (281596560).

Almost surely, 2^2891742684 is an apocalyptic number.

It is an amenable number.

2891742684 is an abundant number, since it is smaller than the sum of its proper divisors (3866574756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2891742684 is a wasteful number, since it uses less digits than its factorization.

2891742684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389929 (or 389927 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 51.

The square root of 2891742684 is about 53774.9261645239. The cubic root of 2891742684 is about 1424.6883790122.

The spelling of 2891742684 in words is "two billion, eight hundred ninety-one million, seven hundred forty-two thousand, six hundred eighty-four".