2891320441 has 9 divisors (see below), whose sum is σ = 3072374031. Its totient is φ = 2720382432.

The previous prime is 2891320403. The next prime is 2891320457. The reversal of 2891320441 is 1440231982.

The square root of 2891320441 is 53771.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2251028025 + 640292416 = 47445^2 + 25304^2 .

It is not a de Polignac number, because 2891320441 - 2¹⁷ = 2891189369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2891320397 and 2891320406.

It is not an unprimeable number, because it can be changed into a prime (2891320541) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 912526 + ... + 915688.

Almost surely, 2^2891320441 is an apocalyptic number.

2891320441 is the 53771-st square number.

2891320441 is the 26886-th centered octagonal number.

It is an amenable number.

2891320441 is a deficient number, since it is larger than the sum of its proper divisors (181053590).

2891320441 is an frugal number, since it uses more digits than its factorization.

2891320441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6360 (or 3180 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The cubic root of 2891320441 is about 1424.6190328263.

The spelling of 2891320441 in words is "two billion, eight hundred ninety-one million, three hundred twenty thousand, four hundred forty-one".