443638 has 16 divisors (see below), whose sum is σ = 727776. Its totient is φ = 201600.

The previous prime is 443629. The next prime is 443659. The reversal of 443638 is 836344.

It is a d-powerful number, because it can be written as 4⁶ + 4⁹ + 6³ + 3³ + 3¹¹ + 8 .

It is a congruent number.

It is an unprimeable number.

443638 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 2863 + ... + 3013.

It is an arithmetic number, because the mean of its divisors is an integer number (45486).

2⁴⁴³⁶³⁸ is an apocalyptic number.

443638 is a deficient number, since it is larger than the sum of its proper divisors (284138).

443638 is a wasteful number, since it uses less digits than its factorization.

443638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279.

The product of its digits is 6912, while the sum is 28.

The square root of 443638 is about 666.0615587166. The cubic root of 443638 is about 76.2680974691.

It can be divided in two parts, 443 and 638, that added together give a triangular number (1081 = T₄₆).

The spelling of 443638 in words is "four hundred forty-three thousand, six hundred thirty-eight".