2891296538 has 16 divisors (see below), whose sum is σ = 4916375520. Its totient is φ = 1264210416.

The previous prime is 2891296537. The next prime is 2891296543. The reversal of 2891296538 is 8356921982.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2891296538.

It is not an unprimeable number, because it can be changed into a prime (2891296537) 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 7 ways as a sum of consecutive naturals, for example, 2925920 + ... + 2926907.

It is an arithmetic number, because the mean of its divisors is an integer number (307273470).

Almost surely, 2^2891296538 is an apocalyptic number.

2891296538 is a deficient number, since it is larger than the sum of its proper divisors (2025078982).

2891296538 is a wasteful number, since it uses less digits than its factorization.

2891296538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5852861.

The product of its digits is 1866240, while the sum is 53.

The square root of 2891296538 is about 53770.7777328913. Note that the first 4 decimals coincide. The cubic root of 2891296538 is about 1424.6151069658.

The spelling of 2891296538 in words is "two billion, eight hundred ninety-one million, two hundred ninety-six thousand, five hundred thirty-eight".