39808 has 16 divisors (see below), whose sum is σ = 79560. Its totient is φ = 19840.

The previous prime is 39799. The next prime is 39821. The reversal of 39808 is 80893.

It is a tau number, because it is divible by the number of its divisors (16).

It is a plaindrome in base 11 and base 15.

It is a zygodrome in base 15.

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, 28 + ... + 283.

2³⁹⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

39808 is a deficient number, since it is larger than the sum of its proper divisors (39752).

39808 is an equidigital number, since it uses as much as digits as its factorization.

39808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 39808 is about 199.5194226134. The cubic root of 39808 is about 34.1447119183.

The spelling of 39808 in words is "thirty-nine thousand, eight hundred eight".