8438 has 4 divisors (see below), whose sum is σ = 12660.
Its totient is φ = 4218.
The previous prime is 8431. The next prime is 8443. The reversal of 8438 is 8348.
8438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes.
It is a plaindrome in base 15.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (8431) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2108 + ... + 2111.
It is an arithmetic number, because the mean of its divisors is an integer number (3165).
28438 is an apocalyptic number.
8438 is a deficient number, since it is larger than the sum of its proper divisors (4222).
8438 is a wasteful number, since it uses less digits than its factorization.
8438 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4221.
The product of its digits is 768, while the sum is 23.
The square root of 8438 is about 91.8585869693.
The cubic root of 8438 is about 20.3585342525.
The spelling of 8438 in words is "eight thousand, four hundred thirty-eight".