438538 has 8 divisors (see below), whose sum is σ = 680580. Its totient is φ = 211680.

The previous prime is 438533. The next prime is 438551. The reversal of 438538 is 835834.

It can be written as a sum of positive squares in 2 ways, for example, as 431649 + 6889 = 657^2 + 83^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (438533) by changing a digit.

438538 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 3 ways as a sum of consecutive naturals, for example, 3723 + ... + 3838.

2⁴³⁸⁵³⁸ is an apocalyptic number.

438538 is a deficient number, since it is larger than the sum of its proper divisors (242042).

438538 is a wasteful number, since it uses less digits than its factorization.

438538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7592.

The product of its digits is 11520, while the sum is 31.

The square root of 438538 is about 662.2220171513. Note that the first 3 decimals coincide. The cubic root of 438538 is about 75.9747145801.

The spelling of 438538 in words is "four hundred thirty-eight thousand, five hundred thirty-eight".