3997646 has 8 divisors (see below), whose sum is σ = 6032880. Its totient is φ = 1986688.

The previous prime is 3997639. The next prime is 3997649. The reversal of 3997646 is 6467993.

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

It is a junction number, because it is equal to n+sod(n) for n = 3997597 and 3997606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5651 + ... + 6318.

It is an arithmetic number, because the mean of its divisors is an integer number (754110).

Almost surely, 2^3997646 is an apocalyptic number.

3997646 is a deficient number, since it is larger than the sum of its proper divisors (2035234).

3997646 is a wasteful number, since it uses less digits than its factorization.

3997646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12138.

The product of its digits is 244944, while the sum is 44.

The square root of 3997646 is about 1999.4114133915. The cubic root of 3997646 is about 158.7089595690.

The spelling of 3997646 in words is "three million, nine hundred ninety-seven thousand, six hundred forty-six".