4004444421 has 12 divisors (see below), whose sum is σ = 5792956780. Its totient is φ = 2665586880.

The previous prime is 4004444383. The next prime is 4004444447. The reversal of 4004444421 is 1244444004.

It can be written as a sum of positive squares in 2 ways, for example, as 3722708196 + 281736225 = 61014^2 + 16785^2 .

It is not a de Polignac number, because 4004444421 - 2⁶ = 4004444357 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 (4004444471) 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 11 ways as a sum of consecutive naturals, for example, 330616 + ... + 342513.

Almost surely, 2^4004444421 is an apocalyptic number.

It is an amenable number.

4004444421 is a deficient number, since it is larger than the sum of its proper divisors (1788512359).

4004444421 is a wasteful number, since it uses less digits than its factorization.

4004444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673796 (or 673793 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

The square root of 4004444421 is about 63280.6796818745. The cubic root of 4004444421 is about 1587.9887575686.

Adding to 4004444421 its reverse (1244444004), we get a palindrome (5248888425).

The spelling of 4004444421 in words is "four billion, four million, four hundred forty-four thousand, four hundred twenty-one".