438591 has 4 divisors (see below), whose sum is σ = 584792. Its totient is φ = 292392.

The previous prime is 438589. The next prime is 438601. The reversal of 438591 is 195834.

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

It is not a de Polignac number, because 438591 - 2¹ = 438589 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438521) 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, 73096 + ... + 73101.

It is an arithmetic number, because the mean of its divisors is an integer number (146198).

2⁴³⁸⁵⁹¹ is an apocalyptic number.

438591 is a deficient number, since it is larger than the sum of its proper divisors (146201).

438591 is a wasteful number, since it uses less digits than its factorization.

438591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146200.

The product of its digits is 4320, while the sum is 30.

The square root of 438591 is about 662.2620327333. The cubic root of 438591 is about 75.9777751265.

The spelling of 438591 in words is "four hundred thirty-eight thousand, five hundred ninety-one".