3985085656 has 16 divisors (see below), whose sum is σ = 7544581200. Its totient is φ = 1973197344.

The previous prime is 3985085641. The next prime is 3985085683. The reversal of 3985085656 is 6565805893.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3985085597 and 3985085606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2417311 + ... + 2418958.

It is an arithmetic number, because the mean of its divisors is an integer number (471536325).

Almost surely, 2^3985085656 is an apocalyptic number.

It is an amenable number.

3985085656 is a deficient number, since it is larger than the sum of its proper divisors (3559495544).

3985085656 is a wasteful number, since it uses less digits than its factorization.

3985085656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4836378 (or 4836374 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 55.

The square root of 3985085656 is about 63127.5348481152. The cubic root of 3985085656 is about 1585.4256743621.

The spelling of 3985085656 in words is "three billion, nine hundred eighty-five million, eighty-five thousand, six hundred fifty-six".