4440424421 has 2 divisors, whose sum is σ = 4440424422. Its totient is φ = 4440424420.

The previous prime is 4440424403. The next prime is 4440424433. The reversal of 4440424421 is 1244240444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2788896100 + 1651528321 = 52810^2 + 40639^2 .

It is a cyclic number.

It is not a de Polignac number, because 4440424421 - 2⁶ = 4440424357 is a prime.

It is a super-2 number, since 2×4440424421² = 39434738077226370482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4440424921) 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 as a sum of consecutive naturals, namely, 2220212210 + 2220212211.

It is an arithmetic number, because the mean of its divisors is an integer number (2220212211).

Almost surely, 2^4440424421 is an apocalyptic number.

It is an amenable number.

4440424421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4440424421 is an equidigital number, since it uses as much as digits as its factorization.

4440424421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16384, while the sum is 29.

The square root of 4440424421 is about 66636.5096700000. The cubic root of 4440424421 is about 1643.6455218360.

Adding to 4440424421 its reverse (1244240444), we get a palindrome (5684664865).

The spelling of 4440424421 in words is "four billion, four hundred forty million, four hundred twenty-four thousand, four hundred twenty-one".