445668 has 12 divisors (see below), whose sum is σ = 1039920. Its totient is φ = 148552.

The previous prime is 445657. The next prime is 445691. The reversal of 445668 is 866544.

It is a happy number.

445668 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 10.

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, 18558 + ... + 18581.

It is an arithmetic number, because the mean of its divisors is an integer number (86660).

2⁴⁴⁵⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

445668 is an abundant number, since it is smaller than the sum of its proper divisors (594252).

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

445668 is a wasteful number, since it uses less digits than its factorization.

445668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37146 (or 37144 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 445668 is about 667.5837026171. The cubic root of 445668 is about 76.3842497434.

The spelling of 445668 in words is "four hundred forty-five thousand, six hundred sixty-eight".