1444444421 has 16 divisors (see below), whose sum is σ = 1659657600. Its totient is φ = 1231469568.

The previous prime is 1444444399. The next prime is 1444444427. The reversal of 1444444421 is 1244444441.

It is not a de Polignac number, because 1444444421 - 2¹⁸ = 1444182277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444444427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1785065 + ... + 1785873.

It is an arithmetic number, because the mean of its divisors is an integer number (103728600).

Almost surely, 2^1444444421 is an apocalyptic number.

It is an amenable number.

1444444421 is a deficient number, since it is larger than the sum of its proper divisors (215213179).

1444444421 is an equidigital number, since it uses as much as digits as its factorization.

1444444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868.

The product of its digits is 32768, while the sum is 32.

The square root of 1444444421 is about 38005.8471948725. The cubic root of 1444444421 is about 1130.4038082223.

Adding to 1444444421 its reverse (1244444441), we get a palindrome (2688888862).

The spelling of 1444444421 in words is "one billion, four hundred forty-four million, four hundred forty-four thousand, four hundred twenty-one".