4244540891 has 12 divisors (see below), whose sum is σ = 4634179200. Its totient is φ = 3882474288.

The previous prime is 4244540869. The next prime is 4244540893. The reversal of 4244540891 is 1980454424.

It is a happy number.

It is not a de Polignac number, because 4244540891 - 2¹⁰ = 4244539867 is a prime.

It is a super-2 number, since 2×4244540891² = 36032254750742147762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4244540893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 192251 + ... + 213188.

It is an arithmetic number, because the mean of its divisors is an integer number (386181600).

Almost surely, 2^4244540891 is an apocalyptic number.

4244540891 is a deficient number, since it is larger than the sum of its proper divisors (389638309).

4244540891 is a wasteful number, since it uses less digits than its factorization.

4244540891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405506 (or 405487 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 4244540891 is about 65150.1411433621. The cubic root of 4244540891 is about 1619.1120586143.

The spelling of 4244540891 in words is "four billion, two hundred forty-four million, five hundred forty thousand, eight hundred ninety-one".