438609 has 4 divisors (see below), whose sum is σ = 584816. Its totient is φ = 292404.

The previous prime is 438601. The next prime is 438611. The reversal of 438609 is 906834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 438609 - 2³ = 438601 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73099 + ... + 73104.

It is an arithmetic number, because the mean of its divisors is an integer number (146204).

2⁴³⁸⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

438609 is a deficient number, since it is larger than the sum of its proper divisors (146207).

438609 is a wasteful number, since it uses less digits than its factorization.

438609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146206.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 438609 is about 662.2756223809. The cubic root of 438609 is about 75.9788145012.

The spelling of 438609 in words is "four hundred thirty-eight thousand, six hundred nine".