3986680646 has 16 divisors (see below), whose sum is σ = 6444068400. Its totient is φ = 1838850528.

The previous prime is 3986680619. The next prime is 3986680667. The reversal of 3986680646 is 6460866893.

It is a junction number, because it is equal to n+sod(n) for n = 3986680591 and 3986680600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5261 + ... + 89448.

It is an arithmetic number, because the mean of its divisors is an integer number (402754275).

Almost surely, 2^3986680646 is an apocalyptic number.

3986680646 is a deficient number, since it is larger than the sum of its proper divisors (2457387754).

3986680646 is a wasteful number, since it uses less digits than its factorization.

3986680646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96343.

The product of its (nonzero) digits is 8957952, while the sum is 56.

The square root of 3986680646 is about 63140.1666611674. The cubic root of 3986680646 is about 1585.6371629827.

The spelling of 3986680646 in words is "three billion, nine hundred eighty-six million, six hundred eighty thousand, six hundred forty-six".