44424421 has 4 divisors (see below), whose sum is σ = 44437932. Its totient is φ = 44410912.

The previous prime is 44424407. The next prime is 44424427. The reversal of 44424421 is 12442444.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2356225 + 42068196 = 1535^2 + 6486^2 .

It is a cyclic number.

It is not a de Polignac number, because 44424421 - 2¹⁹ = 43900133 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 (44424427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1731 + ... + 9583.

It is an arithmetic number, because the mean of its divisors is an integer number (11109483).

Almost surely, 2^44424421 is an apocalyptic number.

It is an amenable number.

44424421 is a deficient number, since it is larger than the sum of its proper divisors (13511).

44424421 is an equidigital number, since it uses as much as digits as its factorization.

44424421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13510.

The product of its digits is 4096, while the sum is 25.

The square root of 44424421 is about 6665.1647391494. The cubic root of 44424421 is about 354.1663198582.

Adding to 44424421 its reverse (12442444), we get a palindrome (56866865).

The spelling of 44424421 in words is "forty-four million, four hundred twenty-four thousand, four hundred twenty-one".