438539 has 4 divisors (see below), whose sum is σ = 461640. Its totient is φ = 415440.

The previous prime is 438533. The next prime is 438551. The reversal of 438539 is 935834.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 438539 - 2⁴ = 438523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438533) 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, 11522 + ... + 11559.

It is an arithmetic number, because the mean of its divisors is an integer number (115410).

2⁴³⁸⁵³⁹ is an apocalyptic number.

438539 is a deficient number, since it is larger than the sum of its proper divisors (23101).

438539 is a wasteful number, since it uses less digits than its factorization.

438539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23100.

The product of its digits is 12960, while the sum is 32.

The square root of 438539 is about 662.2227721847. Note that the first 3 decimals coincide. The cubic root of 438539 is about 75.9747723285.

The spelling of 438539 in words is "four hundred thirty-eight thousand, five hundred thirty-nine".