445218 has 8 divisors (see below), whose sum is σ = 890448. Its totient is φ = 148404.

The previous prime is 445199. The next prime is 445229. The reversal of 445218 is 812544.

It is a sphenic number, since it is the product of 3 distinct primes.

445218 is an admirable number.

It is a Curzon number.

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, 37096 + ... + 37107.

It is an arithmetic number, because the mean of its divisors is an integer number (111306).

2⁴⁴⁵²¹⁸ is an apocalyptic number.

445218 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.

445218 is a wasteful number, since it uses less digits than its factorization.

445218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74208.

The product of its digits is 1280, while the sum is 24.

The square root of 445218 is about 667.2465811078. The cubic root of 445218 is about 76.3585321779.

The spelling of 445218 in words is "four hundred forty-five thousand, two hundred eighteen".