3997668 has 12 divisors (see below), whose sum is σ = 9327920. Its totient is φ = 1332552.

The previous prime is 3997649. The next prime is 3997673. The reversal of 3997668 is 8667993.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166558 + ... + 166581.

Almost surely, 2^3997668 is an apocalyptic number.

It is an amenable number.

3997668 is an abundant number, since it is smaller than the sum of its proper divisors (5330252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3997668 is a wasteful number, since it uses less digits than its factorization.

3997668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333146 (or 333144 counting only the distinct ones).

The product of its digits is 489888, while the sum is 48.

The square root of 3997668 is about 1999.4169150030. The cubic root of 3997668 is about 158.7092507062.

The spelling of 3997668 in words is "three million, nine hundred ninety-seven thousand, six hundred sixty-eight".