3683686856 has 8 divisors (see below), whose sum is σ = 6906912870. Its totient is φ = 1841843424.

The previous prime is 3683686843. The next prime is 3683686933. The reversal of 3683686856 is 6586863863.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3631990756 + 51696100 = 60266^2 + 7190^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 3683686795 and 3683686804.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230230421 + ... + 230230436.

Almost surely, 2^3683686856 is an apocalyptic number.

It is an amenable number.

3683686856 is a deficient number, since it is larger than the sum of its proper divisors (3223226014).

3683686856 is a wasteful number, since it uses less digits than its factorization.

3683686856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460460863 (or 460460859 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 59.

The square root of 3683686856 is about 60693.3839557492. The cubic root of 3683686856 is about 1544.4039420709.

The spelling of 3683686856 in words is "three billion, six hundred eighty-three million, six hundred eighty-six thousand, eight hundred fifty-six".