445500 has 120 divisors (see below), whose sum is σ = 1585584. Its totient is φ = 108000.

The previous prime is 445499. The next prime is 445507. The reversal of 445500 is 5544.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445507) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 40495 + ... + 40505.

2⁴⁴⁵⁵⁰⁰ 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 445500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (792792).

445500 is an abundant number, since it is smaller than the sum of its proper divisors (1140084).

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

445500 is a wasteful number, since it uses less digits than its factorization.

445500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 445500 is about 667.4578638386. The cubic root of 445500 is about 76.3746505449.

The spelling of 445500 in words is "four hundred forty-five thousand, five hundred".