3990556 has 12 divisors (see below), whose sum is σ = 7003080. Its totient is φ = 1989680.

The previous prime is 3990541. The next prime is 3990593. The reversal of 3990556 is 6550993.

3990556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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, 486 + ... + 2866.

It is an arithmetic number, because the mean of its divisors is an integer number (583590).

Almost surely, 2^3990556 is an apocalyptic number.

It is an amenable number.

3990556 is a deficient number, since it is larger than the sum of its proper divisors (3012524).

3990556 is a wasteful number, since it uses less digits than its factorization.

3990556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804 (or 2802 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 3990556 is about 1997.6376047722. The cubic root of 3990556 is about 158.6150782862.

The spelling of 3990556 in words is "three million, nine hundred ninety thousand, five hundred fifty-six".