3987986 has 8 divisors (see below), whose sum is σ = 6296880. Its totient is φ = 1889028.

The previous prime is 3987943. The next prime is 3988003. The reversal of 3987986 is 6897893.

3987986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52436 + ... + 52511.

It is an arithmetic number, because the mean of its divisors is an integer number (787110).

Almost surely, 2^3987986 is an apocalyptic number.

3987986 is a deficient number, since it is larger than the sum of its proper divisors (2308894).

3987986 is a wasteful number, since it uses less digits than its factorization.

3987986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104968.

The product of its digits is 653184, while the sum is 50.

The square root of 3987986 is about 1996.9942413537. The cubic root of 3987986 is about 158.5810205181.

The spelling of 3987986 in words is "three million, nine hundred eighty-seven thousand, nine hundred eighty-six".