3997946 has 8 divisors (see below), whose sum is σ = 6190464. Its totient is φ = 1934460.

The previous prime is 3997933. The next prime is 3997963. The reversal of 3997946 is 6497993.

3997946 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 self number, because there is not a number n which added to its sum of digits gives 3997946.

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, 32180 + ... + 32303.

It is an arithmetic number, because the mean of its divisors is an integer number (773808).

Almost surely, 2^3997946 is an apocalyptic number.

3997946 is a deficient number, since it is larger than the sum of its proper divisors (2192518).

3997946 is a wasteful number, since it uses less digits than its factorization.

3997946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64516.

The product of its digits is 367416, while the sum is 47.

The square root of 3997946 is about 1999.4864340625. The cubic root of 3997946 is about 158.7129295300.

Adding to 3997946 its sum of digits (47), we get a palindrome (3997993).

The spelling of 3997946 in words is "three million, nine hundred ninety-seven thousand, nine hundred forty-six".