440668 has 12 divisors (see below), whose sum is σ = 790272. Its totient is φ = 214880.

The previous prime is 440653. The next prime is 440669. The reversal of 440668 is 866044.

It is a congruent number.

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

440668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 1180 + ... + 1507.

It is an arithmetic number, because the mean of its divisors is an integer number (65856).

2⁴⁴⁰⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

440668 is a deficient number, since it is larger than the sum of its proper divisors (349604).

440668 is a wasteful number, since it uses less digits than its factorization.

440668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732 (or 2730 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 440668 is about 663.8282910512. The cubic root of 440668 is about 76.0975202417.

The spelling of 440668 in words is "four hundred forty thousand, six hundred sixty-eight".