445332330 has 80 divisors (see below), whose sum is σ = 1217214504. Its totient is φ = 116795520.

The previous prime is 445332319. The next prime is 445332347. The reversal of 445332330 is 33233544.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 222934761 + 222397569 = 14931^2 + 14913^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 445332294 and 445332303.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 44904 + ... + 53916.

Almost surely, 2^445332330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445332330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (608607252).

445332330 is an abundant number, since it is smaller than the sum of its proper divisors (771882174).

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

445332330 is a wasteful number, since it uses less digits than its factorization.

445332330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9093 (or 9084 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 27.

The square root of 445332330 is about 21102.8986160669. The cubic root of 445332330 is about 763.6506779552.

Adding to 445332330 its reverse (33233544), we get a palindrome (478565874).

The spelling of 445332330 in words is "four hundred forty-five million, three hundred thirty-two thousand, three hundred thirty".