445380 has 48 divisors (see below), whose sum is σ = 1345344. Its totient is φ = 109440.

The previous prime is 445363. The next prime is 445427. The reversal of 445380 is 83544.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 445380.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 445380.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 495 + ... + 1065.

It is an arithmetic number, because the mean of its divisors is an integer number (28028).

2⁴⁴⁵³⁸⁰ 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 445380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (672672).

445380 is an abundant number, since it is smaller than the sum of its proper divisors (899964).

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

445380 is a wasteful number, since it uses less digits than its factorization.

445380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 445380 is about 667.3679644694. The cubic root of 445380 is about 76.3677924969.

The spelling of 445380 in words is "four hundred forty-five thousand, three hundred eighty".