445509320 has 16 divisors (see below), whose sum is σ = 1002396060. Its totient is φ = 178203712.

The previous prime is 445509313. The next prime is 445509377. The reversal of 445509320 is 23905544.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 432390436 + 13118884 = 20794^2 + 3622^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5568827 + ... + 5568906.

Almost surely, 2^445509320 is an apocalyptic number.

445509320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

445509320 is an abundant number, since it is smaller than the sum of its proper divisors (556886740).

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

445509320 is a wasteful number, since it uses less digits than its factorization.

445509320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11137744 (or 11137740 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 445509320 is about 21107.0916992370. The cubic root of 445509320 is about 763.7518313508.

The spelling of 445509320 in words is "four hundred forty-five million, five hundred nine thousand, three hundred twenty".