440345 has 4 divisors (see below), whose sum is σ = 528420. Its totient is φ = 352272.

The previous prime is 440339. The next prime is 440347. The reversal of 440345 is 543044.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 267289 + 173056 = 517^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 440345 - 2⁴ = 440329 is a prime.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 440345.

It is not an unprimeable number, because it can be changed into a prime (440347) 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, 44030 + ... + 44039.

It is an arithmetic number, because the mean of its divisors is an integer number (132105).

2⁴⁴⁰³⁴⁵ is an apocalyptic number.

It is an amenable number.

440345 is a deficient number, since it is larger than the sum of its proper divisors (88075).

440345 is an equidigital number, since it uses as much as digits as its factorization.

440345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88074.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 440345 is about 663.5849606494. The cubic root of 440345 is about 76.0789230915.

Adding to 440345 its reverse (543044), we get a palindrome (983389).

It can be divided in two parts, 4403 and 45, that multiplied together give a triangular number (198135 = T₆₂₉).

The spelling of 440345 in words is "four hundred forty thousand, three hundred forty-five".