445443220 has 48 divisors (see below), whose sum is σ = 995803200. Its totient is φ = 166890240.

The previous prime is 445443211. The next prime is 445443223. The reversal of 445443220 is 22344544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445443223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27235 + ... + 40405.

It is an arithmetic number, because the mean of its divisors is an integer number (20745900).

Almost surely, 2^445443220 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 445443220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (497901600).

445443220 is an abundant number, since it is smaller than the sum of its proper divisors (550359980).

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

445443220 is a wasteful number, since it uses less digits than its factorization.

445443220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13288 (or 13286 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 28.

The square root of 445443220 is about 21105.5258167144. The cubic root of 445443220 is about 763.7140569872.

Adding to 445443220 its reverse (22344544), we get a palindrome (467787764).

It can be divided in two parts, 4454 and 43220, that added together give a palindrome (47674).

The spelling of 445443220 in words is "four hundred forty-five million, four hundred forty-three thousand, two hundred twenty".