1441448891 has 4 divisors (see below), whose sum is σ = 1442331072. Its totient is φ = 1440566712.

The previous prime is 1441448867. The next prime is 1441448903. The reversal of 1441448891 is 1988441441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1441448891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1441448861) 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 3 ways as a sum of consecutive naturals, for example, 438635 + ... + 441908.

It is an arithmetic number, because the mean of its divisors is an integer number (360582768).

Almost surely, 2^1441448891 is an apocalyptic number.

1441448891 is a deficient number, since it is larger than the sum of its proper divisors (882181).

1441448891 is an equidigital number, since it uses as much as digits as its factorization.

1441448891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882180.

The product of its digits is 147456, while the sum is 44.

The square root of 1441448891 is about 37966.4179374352. The cubic root of 1441448891 is about 1129.6218462117.

The spelling of 1441448891 in words is "one billion, four hundred forty-one million, four hundred forty-eight thousand, eight hundred ninety-one".