438506 has 8 divisors (see below), whose sum is σ = 661284. Its totient is φ = 218080.

The previous prime is 438499. The next prime is 438517. The reversal of 438506 is 605834.

It can be written as a sum of positive squares in 2 ways, for example, as 434281 + 4225 = 659^2 + 65^2 .

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

It is an unprimeable number.

438506 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, 5 + ... + 936.

2⁴³⁸⁵⁰⁶ is an apocalyptic number.

438506 is a deficient number, since it is larger than the sum of its proper divisors (222778).

438506 is a wasteful number, since it uses less digits than its factorization.

438506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 438506 is about 662.1978556293. The cubic root of 438506 is about 75.9728665836.

The spelling of 438506 in words is "four hundred thirty-eight thousand, five hundred six".