4440432321 has 12 divisors (see below), whose sum is σ = 6907339348. Its totient is φ = 2732573664.

The previous prime is 4440432313. The next prime is 4440432323. The reversal of 4440432321 is 1232340444.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2673407025 + 1767025296 = 51705^2 + 42036^2 .

It is not a de Polignac number, because 4440432321 - 2³ = 4440432313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4440432323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18976090 + ... + 18976323.

Almost surely, 2^4440432321 is an apocalyptic number.

It is an amenable number.

4440432321 is a deficient number, since it is larger than the sum of its proper divisors (2466907027).

4440432321 is a wasteful number, since it uses less digits than its factorization.

4440432321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37952432 (or 37952429 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 4440432321 is about 66636.5689467878. The cubic root of 4440432321 is about 1643.6464965771.

Adding to 4440432321 its reverse (1232340444), we get a palindrome (5672772765).

The spelling of 4440432321 in words is "four billion, four hundred forty million, four hundred thirty-two thousand, three hundred twenty-one".