443409 has 8 divisors (see below), whose sum is σ = 601152. Its totient is φ = 290640.

The previous prime is 443407. The next prime is 443413. The reversal of 443409 is 904344.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 443409 - 2¹ = 443407 is a prime.

It is a super-2 number, since 2×443409² = 393223082562, which contains 22 as substring.

It is a Curzon number.

443409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (443407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1029 + ... + 1394.

It is an arithmetic number, because the mean of its divisors is an integer number (75144).

2⁴⁴³⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

443409 is a deficient number, since it is larger than the sum of its proper divisors (157743).

443409 is a wasteful number, since it uses less digits than its factorization.

443409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 443409 is about 665.8896304944. The cubic root of 443409 is about 76.2549723533.

The spelling of 443409 in words is "four hundred forty-three thousand, four hundred nine".