1808 has 10 divisors (see below), whose sum is σ = 3534. Its totient is φ = 896.

The previous prime is 1801. The next prime is 1811. The reversal of 1808 is 8081.

It is a happy number.

1808 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in only one way, i.e., 1024 + 784 = 32^2 + 28^2 .

1808 is an undulating number in base 15.

It is a nialpdrome in base 13, base 14 and base 16.

It is not an unprimeable number, because it can be changed into a prime (1801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41 + ... + 72.

It is an amenable number.

1808 is a deficient number, since it is larger than the sum of its proper divisors (1726).

1808 is a wasteful number, since it uses less digits than its factorization.

1808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1808 is about 42.5205832509. The cubic root of 1808 is about 12.1823986978.

Adding to 1808 its reverse (8081), we get a palindrome (9889).

The spelling of 1808 in words is "one thousand, eight hundred eight".