445552668 has 144 divisors (see below), whose sum is σ = 1290691584. Its totient is φ = 128373120.

The previous prime is 445552663. The next prime is 445552669. The reversal of 445552668 is 866255544.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445552663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 688321 + ... + 688967.

It is an arithmetic number, because the mean of its divisors is an integer number (8963136).

Almost surely, 2^445552668 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 445552668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (645345792).

445552668 is an abundant number, since it is smaller than the sum of its proper divisors (845138916).

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

445552668 is a wasteful number, since it uses less digits than its factorization.

445552668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752 (or 747 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The square root of 445552668 is about 21108.1185329247. The cubic root of 445552668 is about 763.7766015326.

The spelling of 445552668 in words is "four hundred forty-five million, five hundred fifty-two thousand, six hundred sixty-eight".