3986847 has 8 divisors (see below), whose sum is σ = 5906480. Its totient is φ = 2657880.

The previous prime is 3986839. The next prime is 3986897. The reversal of 3986847 is 7486893.

It is a happy number.

It is not a de Polignac number, because 3986847 - 2³ = 3986839 is a prime.

It is a d-powerful number, because it can be written as 3¹³ + 9² + 8⁵ + 6² + 8⁷ + 4⁹ + 7³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3986897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73804 + ... + 73857.

It is an arithmetic number, because the mean of its divisors is an integer number (738310).

Almost surely, 2^3986847 is an apocalyptic number.

3986847 is a deficient number, since it is larger than the sum of its proper divisors (1919633).

3986847 is a wasteful number, since it uses less digits than its factorization.

3986847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147670 (or 147664 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 3986847 is about 1996.7090423995. The cubic root of 3986847 is about 158.5659217539.

The spelling of 3986847 in words is "three million, nine hundred eighty-six thousand, eight hundred forty-seven".