4431966 has 64 divisors (see below), whose sum is σ = 11321856. Its totient is φ = 1123200.

The previous prime is 4431961. The next prime is 4431989. The reversal of 4431966 is 6691344.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4431961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24396 + ... + 24576.

It is an arithmetic number, because the mean of its divisors is an integer number (176904).

Almost surely, 2^4431966 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4431966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5660928).

4431966 is an abundant number, since it is smaller than the sum of its proper divisors (6889890).

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

4431966 is a wasteful number, since it uses less digits than its factorization.

4431966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257.

The product of its digits is 15552, while the sum is 33.

The square root of 4431966 is about 2105.2235035739. The cubic root of 4431966 is about 164.2601216052.

The spelling of 4431966 in words is "four million, four hundred thirty-one thousand, nine hundred sixty-six".