5818 has 4 divisors (see below), whose sum is σ = 8730. Its totient is φ = 2908.

The previous prime is 5813. The next prime is 5821. The reversal of 5818 is 8185.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8185 = 5 ⋅1637.

It can be written as a sum of positive squares in only one way, i.e., 3969 + 1849 = 63^2 + 43^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a plaindrome in base 12 and base 15.

It is not an unprimeable number, because it can be changed into a prime (5813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1453 + ... + 1456.

2⁵⁸¹⁸ is an apocalyptic number.

5818 is a deficient number, since it is larger than the sum of its proper divisors (2912).

5818 is a wasteful number, since it uses less digits than its factorization.

5818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911.

The product of its digits is 320, while the sum is 22.

The square root of 5818 is about 76.2758153021. The cubic root of 5818 is about 17.9855851672.

The spelling of 5818 in words is "five thousand, eight hundred eighteen".