444664 has 32 divisors (see below), whose sum is σ = 944640. Its totient is φ = 194400.

The previous prime is 444649. The next prime is 444671. The reversal of 444664 is 466444.

It is a congruent number.

It is an unprimeable number.

444664 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 7 ways as a sum of consecutive naturals, for example, 2647 + ... + 2809.

It is an arithmetic number, because the mean of its divisors is an integer number (29520).

2⁴⁴⁴⁶⁶⁴ is an apocalyptic number.

444664 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 444664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (472320).

444664 is an abundant number, since it is smaller than the sum of its proper divisors (499976).

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

444664 is a wasteful number, since it uses less digits than its factorization.

444664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 207 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The square root of 444664 is about 666.8313130020. The cubic root of 444664 is about 76.3268471868.

The spelling of 444664 in words is "four hundred forty-four thousand, six hundred sixty-four".