3986646 has 8 divisors (see below), whose sum is σ = 7973304. Its totient is φ = 1328880.

The previous prime is 3986641. The next prime is 3986651. The reversal of 3986646 is 6466893.

It is an interprime number because it is at equal distance from previous prime (3986641) and next prime (3986651).

It is a sphenic number, since it is the product of 3 distinct primes.

3986646 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 3986598 and 3986607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3986641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332215 + ... + 332226.

It is an arithmetic number, because the mean of its divisors is an integer number (996663).

Almost surely, 2^3986646 is an apocalyptic number.

3986646 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.

3986646 is a wasteful number, since it uses less digits than its factorization.

3986646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664446.

The product of its digits is 186624, while the sum is 42.

The square root of 3986646 is about 1996.6587089435. The cubic root of 3986646 is about 158.5632569676.

The spelling of 3986646 in words is "three million, nine hundred eighty-six thousand, six hundred forty-six".