39656 has 8 divisors (see below), whose sum is σ = 74370. Its totient is φ = 19824.

The previous prime is 39631. The next prime is 39659. The reversal of 39656 is 65693.

39656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 27556 + 12100 = 166^2 + 110^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 39656.

It is not an unprimeable number, because it can be changed into a prime (39659) by changing a digit.

39656 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 as a sum of consecutive naturals, namely, 2471 + ... + 2486.

2³⁹⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

39656 is a deficient number, since it is larger than the sum of its proper divisors (34714).

39656 is a wasteful number, since it uses less digits than its factorization.

39656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4963 (or 4959 counting only the distinct ones).

The product of its digits is 4860, while the sum is 29.

The square root of 39656 is about 199.1381430063. The cubic root of 39656 is about 34.1011979180.

The spelling of 39656 in words is "thirty-nine thousand, six hundred fifty-six".