3997658 has 16 divisors (see below), whose sum is σ = 6884160. Its totient is φ = 1705536.

The previous prime is 3997649. The next prime is 3997673. The reversal of 3997658 is 8567993.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3458 + ... + 4466.

It is an arithmetic number, because the mean of its divisors is an integer number (430260).

Almost surely, 2^3997658 is an apocalyptic number.

3997658 is a deficient number, since it is larger than the sum of its proper divisors (2886502).

3997658 is a wasteful number, since it uses less digits than its factorization.

3997658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301.

The product of its digits is 408240, while the sum is 47.

The square root of 3997658 is about 1999.4144142723. The cubic root of 3997658 is about 158.7091183712.

The spelling of 3997658 in words is "three million, nine hundred ninety-seven thousand, six hundred fifty-eight".