438638 has 8 divisors (see below), whose sum is σ = 667440. Its totient is φ = 216160.

The previous prime is 438637. The next prime is 438661. The reversal of 438638 is 836834.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1403 + ... + 1686.

It is an arithmetic number, because the mean of its divisors is an integer number (83430).

2⁴³⁸⁶³⁸ is an apocalyptic number.

438638 is a deficient number, since it is larger than the sum of its proper divisors (228802).

438638 is a wasteful number, since it uses less digits than its factorization.

438638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162.

The product of its digits is 13824, while the sum is 32.

The square root of 438638 is about 662.2975162267. The cubic root of 438638 is about 75.9804889896.

The spelling of 438638 in words is "four hundred thirty-eight thousand, six hundred thirty-eight".