445648 has 40 divisors (see below), whose sum is σ = 1035648. Its totient is φ = 181632.

The previous prime is 445633. The next prime is 445649. The reversal of 445648 is 846544.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445649) by changing a digit.

445648 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2490 + ... + 2662.

2⁴⁴⁵⁶⁴⁸ 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 445648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (517824).

445648 is an abundant number, since it is smaller than the sum of its proper divisors (590000).

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

445648 is a wasteful number, since it uses less digits than its factorization.

445648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 205 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

The square root of 445648 is about 667.5687230540. The cubic root of 445648 is about 76.3831071082.

The spelling of 445648 in words is "four hundred forty-five thousand, six hundred forty-eight".