445816 has 32 divisors (see below), whose sum is σ = 1008000. Its totient is φ = 180576.

The previous prime is 445807. The next prime is 445829. The reversal of 445816 is 618544.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855 + ... + 1273.

It is an arithmetic number, because the mean of its divisors is an integer number (31500).

2⁴⁴⁵⁸¹⁶ 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 445816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504000).

445816 is an abundant number, since it is smaller than the sum of its proper divisors (562184).

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

445816 is a wasteful number, since it uses less digits than its factorization.

445816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 447 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 445816 is about 667.6945409392. The cubic root of 445816 is about 76.3927041816.

The spelling of 445816 in words is "four hundred forty-five thousand, eight hundred sixteen".