13438 has 4 divisors (see below), whose sum is σ = 20160. Its totient is φ = 6718.

The previous prime is 13421. The next prime is 13441. The reversal of 13438 is 83431.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3358 + ... + 3361.

It is an arithmetic number, because the mean of its divisors is an integer number (5040).

2¹³⁴³⁸ is an apocalyptic number.

13438 is a deficient number, since it is larger than the sum of its proper divisors (6722).

13438 is an equidigital number, since it uses as much as digits as its factorization.

13438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6721.

The product of its digits is 288, while the sum is 19.

The square root of 13438 is about 115.9223878291. The cubic root of 13438 is about 23.7745084030.

Adding to 13438 its reverse (83431), we get a palindrome (96869).

The spelling of 13438 in words is "thirteen thousand, four hundred thirty-eight".