440324242421 has 20 divisors (see below), whose sum is σ = 515323083852. Its totient is φ = 376214319936.

The previous prime is 440324242409. The next prime is 440324242453. The reversal of 440324242421 is 124242423044.

It can be written as a sum of positive squares in 2 ways, for example, as 37670539921 + 402653702500 = 194089^2 + 634550^2 .

It is not a de Polignac number, because 440324242421 - 2¹⁸ = 440323980277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440324242021) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 458555 + ... + 1044471.

Almost surely, 2^440324242421 is an apocalyptic number.

It is an amenable number.

440324242421 is a deficient number, since it is larger than the sum of its proper divisors (74998841431).

440324242421 is an frugal number, since it uses more digits than its factorization.

440324242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586258 (or 586237 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 440324242421 its reverse (124242423044), we get a palindrome (564566665465).

The spelling of 440324242421 in words is "four hundred forty billion, three hundred twenty-four million, two hundred forty-two thousand, four hundred twenty-one".