445689 has 16 divisors (see below), whose sum is σ = 699840. Its totient is φ = 279360.

The previous prime is 445657. The next prime is 445691. The reversal of 445689 is 986544.

It is not a de Polignac number, because 445689 - 2⁵ = 445657 is a prime.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (445619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27 + ... + 944.

It is an arithmetic number, because the mean of its divisors is an integer number (43740).

2⁴⁴⁵⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

445689 is a deficient number, since it is larger than the sum of its proper divisors (254151).

445689 is a wasteful number, since it uses less digits than its factorization.

445689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997 (or 991 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 445689 is about 667.5994307966. The cubic root of 445689 is about 76.3854494735.

Adding to 445689 its product of digits (34560), we get a square (480249 = 693²).

The spelling of 445689 in words is "four hundred forty-five thousand, six hundred eighty-nine".