445646 has 4 divisors (see below), whose sum is σ = 668472. Its totient is φ = 222822.

The previous prime is 445633. The next prime is 445649. The reversal of 445646 is 646544.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 445646.

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

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 as a sum of consecutive naturals, namely, 111410 + ... + 111413.

It is an arithmetic number, because the mean of its divisors is an integer number (167118).

2⁴⁴⁵⁶⁴⁶ is an apocalyptic number.

445646 is a deficient number, since it is larger than the sum of its proper divisors (222826).

445646 is a wasteful number, since it uses less digits than its factorization.

445646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222825.

The product of its digits is 11520, while the sum is 29.

The square root of 445646 is about 667.5672250792. The cubic root of 445646 is about 76.3829928428.

The spelling of 445646 in words is "four hundred forty-five thousand, six hundred forty-six".