440342321 has 4 divisors (see below), whose sum is σ = 454546944. Its totient is φ = 426137700.

The previous prime is 440342303. The next prime is 440342333. The reversal of 440342321 is 123243044.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 440342321 - 2¹⁸ = 440080177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440342341) 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, 7102265 + ... + 7102326.

It is an arithmetic number, because the mean of its divisors is an integer number (113636736).

Almost surely, 2^440342321 is an apocalyptic number.

It is an amenable number.

440342321 is a deficient number, since it is larger than the sum of its proper divisors (14204623).

440342321 is a wasteful number, since it uses less digits than its factorization.

440342321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14204622.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 440342321 is about 20984.3351336181. The cubic root of 440342321 is about 760.7876880653.

Adding to 440342321 its reverse (123243044), we get a palindrome (563585365).

The spelling of 440342321 in words is "four hundred forty million, three hundred forty-two thousand, three hundred twenty-one".