3998566 has 48 divisors (see below), whose sum is σ = 7507584. Its totient is φ = 1584000.

The previous prime is 3998557. The next prime is 3998567. The reversal of 3998566 is 6658993.

3998566 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 not an unprimeable number, because it can be changed into a prime (3998567) 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 23 ways as a sum of consecutive naturals, for example, 97506 + ... + 97546.

It is an arithmetic number, because the mean of its divisors is an integer number (156408).

Almost surely, 2^3998566 is an apocalyptic number.

3998566 is a deficient number, since it is larger than the sum of its proper divisors (3509018).

3998566 is a wasteful number, since it uses less digits than its factorization.

3998566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 98 counting only the distinct ones).

The product of its digits is 349920, while the sum is 46.

The square root of 3998566 is about 1999.6414678637. The cubic root of 3998566 is about 158.7211334869.

The spelling of 3998566 in words is "three million, nine hundred ninety-eight thousand, five hundred sixty-six".