445564 has 12 divisors (see below), whose sum is σ = 891184. Its totient is φ = 190944.

The previous prime is 445541. The next prime is 445567. The reversal of 445564 is 465544.

445564 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 15913 = 445564 / (4 + 4 + 5 + 5 + 6 + 4).

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445567) 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 3 ways as a sum of consecutive naturals, for example, 7929 + ... + 7984.

2⁴⁴⁵⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

445564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

445564 is a wasteful number, since it uses less digits than its factorization.

445564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15924 (or 15922 counting only the distinct ones).

The product of its digits is 9600, while the sum is 28.

The square root of 445564 is about 667.5058052182. The cubic root of 445564 is about 76.3783076669.

The spelling of 445564 in words is "four hundred forty-five thousand, five hundred sixty-four".