440665 has 8 divisors (see below), whose sum is σ = 546048. Its totient is φ = 341040.

The previous prime is 440653. The next prime is 440669. The reversal of 440665 is 566044.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 440665 - 2⁷ = 440537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1267 + ... + 1576.

It is an arithmetic number, because the mean of its divisors is an integer number (68256).

2⁴⁴⁰⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

440665 is a deficient number, since it is larger than the sum of its proper divisors (105383).

440665 is a wasteful number, since it uses less digits than its factorization.

440665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2879.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 440665 is about 663.8260314269. The cubic root of 440665 is about 76.0973475545.

The spelling of 440665 in words is "four hundred forty thousand, six hundred sixty-five".