445540 has 12 divisors (see below), whose sum is σ = 935676. Its totient is φ = 178208.

The previous prime is 445537. The next prime is 445541. The reversal of 445540 is 45544.

445540 = T₂₀₁ + T₂₀₂ + ... + T₂₂₀.

It can be written as a sum of positive squares in 2 ways, for example, as 272484 + 173056 = 522^2 + 416^2 .

It is not an unprimeable number, because it can be changed into a prime (445541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11119 + ... + 11158.

It is an arithmetic number, because the mean of its divisors is an integer number (77973).

2⁴⁴⁵⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

445540 is an abundant number, since it is smaller than the sum of its proper divisors (490136).

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

445540 is a wasteful number, since it uses less digits than its factorization.

445540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22286 (or 22284 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 445540 is about 667.4878276044. The cubic root of 445540 is about 76.3769362872.

The spelling of 445540 in words is "four hundred forty-five thousand, five hundred forty".