3947668 has 24 divisors (see below), whose sum is σ = 7347200. Its totient is φ = 1850688.

The previous prime is 3947663. The next prime is 3947693. The reversal of 3947668 is 8667493.

It is a happy number.

3947668 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 (3947663) 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 7 ways as a sum of consecutive naturals, for example, 9448 + ... + 9856.

Almost surely, 2^3947668 is an apocalyptic number.

3947668 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

3947668 is a deficient number, since it is larger than the sum of its proper divisors (3399532).

3947668 is a wasteful number, since it uses less digits than its factorization.

3947668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 557 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The square root of 3947668 is about 1986.8739265489. The cubic root of 3947668 is about 158.0447984917.

The spelling of 3947668 in words is "three million, nine hundred forty-seven thousand, six hundred sixty-eight".