445645220 has 24 divisors (see below), whose sum is σ = 936273408. Its totient is φ = 178178400.

The previous prime is 445645201. The next prime is 445645237. The reversal of 445645220 is 22546544.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64535 + ... + 71105.

It is an arithmetic number, because the mean of its divisors is an integer number (39011392).

Almost surely, 2^445645220 is an apocalyptic number.

It is an amenable number.

445645220 is an abundant number, since it is smaller than the sum of its proper divisors (490628188).

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

445645220 is a wasteful number, since it uses less digits than its factorization.

445645220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9971 (or 9969 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 445645220 is about 21110.3107509103. The cubic root of 445645220 is about 763.8294827916.

The spelling of 445645220 in words is "four hundred forty-five million, six hundred forty-five thousand, two hundred twenty".