39856 has 20 divisors (see below), whose sum is σ = 80352. Its totient is φ = 19136.

The previous prime is 39847. The next prime is 39857. The reversal of 39856 is 65893.

39856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (6480) is a multiple of the sum of its prime factors (108).

It is not an unprimeable number, because it can be changed into a prime (39857) by changing a digit.

39856 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726 + ... + 778.

2³⁹⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

39856 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40176).

39856 is a wasteful number, since it uses less digits than its factorization.

39856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 102 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 39856 is about 199.6396754155. The cubic root of 39856 is about 34.1584301648.

It can be divided in two parts, 398 and 56, that added together give a palindrome (454).

The spelling of 39856 in words is "thirty-nine thousand, eight hundred fifty-six".