438791 has 4 divisors (see below), whose sum is σ = 440952. Its totient is φ = 436632.

The previous prime is 438769. The next prime is 438793. The reversal of 438791 is 197834.

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 438791 - 2¹⁴ = 422407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438793) 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, 740 + ... + 1193.

It is an arithmetic number, because the mean of its divisors is an integer number (110238).

2⁴³⁸⁷⁹¹ is an apocalyptic number.

438791 is a deficient number, since it is larger than the sum of its proper divisors (2161).

438791 is a wasteful number, since it uses less digits than its factorization.

438791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its digits is 6048, while the sum is 32.

The square root of 438791 is about 662.4130131572. The cubic root of 438791 is about 75.9893221379.

The spelling of 438791 in words is "four hundred thirty-eight thousand, seven hundred ninety-one".