438331 has 4 divisors (see below), whose sum is σ = 449064. Its totient is φ = 427600.

The previous prime is 438329. The next prime is 438341. The reversal of 438331 is 133834.

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 438331 - 2¹ = 438329 is a prime.

It is a super-2 number, since 2×438331² = 384268131122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (438301) 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, 5305 + ... + 5386.

It is an arithmetic number, because the mean of its divisors is an integer number (112266).

2⁴³⁸³³¹ is an apocalyptic number.

438331 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

438331 is a deficient number, since it is larger than the sum of its proper divisors (10733).

438331 is a wasteful number, since it uses less digits than its factorization.

438331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10732.

The product of its digits is 864, while the sum is 22.

The square root of 438331 is about 662.0657067089. The cubic root of 438331 is about 75.9627587625.

It can be divided in two parts, 43833 and 1, that added together give a palindrome (43834).

The spelling of 438331 in words is "four hundred thirty-eight thousand, three hundred thirty-one".