445638 has 24 divisors (see below), whose sum is σ = 950472. Its totient is φ = 139264.

The previous prime is 445633. The next prime is 445649. The reversal of 445638 is 836544.

445638 is nontrivially palindromic in base 16.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1606 + ... + 1862.

It is an arithmetic number, because the mean of its divisors is an integer number (39603).

2⁴⁴⁵⁶³⁸ is an apocalyptic number.

445638 is an abundant number, since it is smaller than the sum of its proper divisors (504834).

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

445638 is a wasteful number, since it uses less digits than its factorization.

445638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 279 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 445638 is about 667.5612331464. The cubic root of 445638 is about 76.3825357777.

The spelling of 445638 in words is "four hundred forty-five thousand, six hundred thirty-eight".