438318 has 16 divisors (see below), whose sum is σ = 974160. Its totient is φ = 146088.

The previous prime is 438313. The next prime is 438329. The reversal of 438318 is 813834.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 438291 and 438300.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 438318.

It is not an unprimeable number, because it can be changed into a prime (438313) by changing a digit.

438318 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4005 + ... + 4112.

It is an arithmetic number, because the mean of its divisors is an integer number (60885).

2⁴³⁸³¹⁸ is an apocalyptic number.

438318 is an abundant number, since it is smaller than the sum of its proper divisors (535842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

438318 is a wasteful number, since it uses less digits than its factorization.

438318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8128 (or 8122 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 438318 is about 662.0558888795. The cubic root of 438318 is about 75.9620077884.

The spelling of 438318 in words is "four hundred thirty-eight thousand, three hundred eighteen".