3945688 has 8 divisors (see below), whose sum is σ = 7398180. Its totient is φ = 1972840.

The previous prime is 3945677. The next prime is 3945701. The reversal of 3945688 is 8865493.

3945688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 246598 + ... + 246613.

Almost surely, 2^3945688 is an apocalyptic number.

It is an amenable number.

3945688 is a deficient number, since it is larger than the sum of its proper divisors (3452492).

3945688 is a wasteful number, since it uses less digits than its factorization.

3945688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493217 (or 493213 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 3945688 is about 1986.3755938895. The cubic root of 3945688 is about 158.0183709878.

The spelling of 3945688 in words is "three million, nine hundred forty-five thousand, six hundred eighty-eight".