440045 has 16 divisors (see below), whose sum is σ = 580608. Its totient is φ = 318720.

The previous prime is 440039. The next prime is 440047. The reversal of 440045 is 540044.

It is not a de Polignac number, because 440045 - 2⁶ = 439981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 (440047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2552 + ... + 2718.

It is an arithmetic number, because the mean of its divisors is an integer number (36288).

2⁴⁴⁰⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

440045 is a deficient number, since it is larger than the sum of its proper divisors (140563).

440045 is a wasteful number, since it uses less digits than its factorization.

440045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 440045 is about 663.3588772301. The cubic root of 440045 is about 76.0616420490.

Adding to 440045 its reverse (540044), we get a palindrome (980089).

Subtracting 440045 from its reverse (540044), we obtain a palindrome (99999).

The spelling of 440045 in words is "four hundred forty thousand, forty-five".