4423664 has 40 divisors (see below), whose sum is σ = 9904128. Its totient is φ = 1874880.

The previous prime is 4423649. The next prime is 4423667. The reversal of 4423664 is 4663244.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4423667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14069 + ... + 14379.

Almost surely, 2^4423664 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 4423664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4952064).

4423664 is an abundant number, since it is smaller than the sum of its proper divisors (5480464).

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

4423664 is a wasteful number, since it uses less digits than its factorization.

4423664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 447 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

The square root of 4423664 is about 2103.2508171875. The cubic root of 4423664 is about 164.1574929668.

The spelling of 4423664 in words is "four million, four hundred twenty-three thousand, six hundred sixty-four".