441664 has 28 divisors (see below), whose sum is σ = 898144. Its totient is φ = 215424.

The previous prime is 441647. The next prime is 441667. The reversal of 441664 is 466144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441667) by changing a digit.

441664 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4237 + ... + 4339.

2⁴⁴¹⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 441664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (449072).

441664 is an abundant number, since it is smaller than the sum of its proper divisors (456480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

441664 is a wasteful number, since it uses less digits than its factorization.

441664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 172 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 441664 is about 664.5780616301. The cubic root of 441664 is about 76.1548090994.

The spelling of 441664 in words is "four hundred forty-one thousand, six hundred sixty-four".