443640252 has 48 divisors (see below), whose sum is σ = 1135008000. Its totient is φ = 133752960.

The previous prime is 443640247. The next prime is 443640269. The reversal of 443640252 is 252046344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17824 + ... + 34712.

It is an arithmetic number, because the mean of its divisors is an integer number (23646000).

Almost surely, 2^443640252 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 443640252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (567504000).

443640252 is an abundant number, since it is smaller than the sum of its proper divisors (691367748).

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

443640252 is a wasteful number, since it uses less digits than its factorization.

443640252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17106 (or 17104 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 443640252 is about 21062.7693335895. The cubic root of 443640252 is about 762.6822651986.

Adding to 443640252 its reverse (252046344), we get a palindrome (695686596).

The spelling of 443640252 in words is "four hundred forty-three million, six hundred forty thousand, two hundred fifty-two".