5438 has 4 divisors (see below), whose sum is σ = 8160. Its totient is φ = 2718.

The previous prime is 5437. The next prime is 5441. The reversal of 5438 is 8345.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8345 = 5 ⋅1669.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1358 + ... + 1361.

It is an arithmetic number, because the mean of its divisors is an integer number (2040).

2⁵⁴³⁸ is an apocalyptic number.

5438 is a deficient number, since it is larger than the sum of its proper divisors (2722).

5438 is a wasteful number, since it uses less digits than its factorization.

5438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721.

The product of its digits is 480, while the sum is 20.

The square root of 5438 is about 73.7427962583. The cubic root of 5438 is about 17.5851631158.

The spelling of 5438 in words is "five thousand, four hundred thirty-eight".