438005 has 8 divisors (see below), whose sum is σ = 556632. Its totient is φ = 329728.

The previous prime is 438001. The next prime is 438017. The reversal of 438005 is 500834.

It can be written as a sum of positive squares in 4 ways, for example, as 114244 + 323761 = 338^2 + 569^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 438005 - 2² = 438001 is a prime.

It is a Duffinian number.

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 (438001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2492 + ... + 2661.

It is an arithmetic number, because the mean of its divisors is an integer number (69579).

2⁴³⁸⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

438005 is a deficient number, since it is larger than the sum of its proper divisors (118627).

438005 is a wasteful number, since it uses less digits than its factorization.

438005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5175.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 438005 is about 661.8194617870. The cubic root of 438005 is about 75.9439221595.

Adding to 438005 its reverse (500834), we get a palindrome (938839).

The spelling of 438005 in words is "four hundred thirty-eight thousand, five".