445981224 has 128 divisors (see below), whose sum is σ = 1319270400. Its totient is φ = 124312320.

The previous prime is 445981223. The next prime is 445981253. The reversal of 445981224 is 422189544.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (445981223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134709 + ... + 137979.

It is an arithmetic number, because the mean of its divisors is an integer number (10306800).

Almost surely, 2^445981224 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 445981224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (659635200).

445981224 is an abundant number, since it is smaller than the sum of its proper divisors (873289176).

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

445981224 is a wasteful number, since it uses less digits than its factorization.

445981224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3335 (or 3331 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 445981224 is about 21118.2675425803. The cubic root of 445981224 is about 764.0214032362.

The spelling of 445981224 in words is "four hundred forty-five million, nine hundred eighty-one thousand, two hundred twenty-four".