3987556 has 24 divisors (see below), whose sum is σ = 7378560. Its totient is φ = 1881792.

The previous prime is 3987551. The next prime is 3987559. The reversal of 3987556 is 6557893.

3987556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3987551) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7945 + ... + 8431.

It is an arithmetic number, because the mean of its divisors is an integer number (307440).

Almost surely, 2^3987556 is an apocalyptic number.

It is an amenable number.

3987556 is a deficient number, since it is larger than the sum of its proper divisors (3391004).

3987556 is a wasteful number, since it uses less digits than its factorization.

3987556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603 (or 601 counting only the distinct ones).

The product of its digits is 226800, while the sum is 43.

The square root of 3987556 is about 1996.8865766488. The cubic root of 3987556 is about 158.5753207079.

The spelling of 3987556 in words is "three million, nine hundred eighty-seven thousand, five hundred fifty-six".