3947906 has 8 divisors (see below), whose sum is σ = 6048000. Its totient is φ = 1931908.

The previous prime is 3947903. The next prime is 3947921. The reversal of 3947906 is 6097493.

3947906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3947906.

It is not an unprimeable number, because it can be changed into a prime (3947903) 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 3 ways as a sum of consecutive naturals, for example, 20906 + ... + 21093.

It is an arithmetic number, because the mean of its divisors is an integer number (756000).

Almost surely, 2^3947906 is an apocalyptic number.

3947906 is a deficient number, since it is larger than the sum of its proper divisors (2100094).

3947906 is a wasteful number, since it uses less digits than its factorization.

3947906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42048.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 3947906 is about 1986.9338187267. The cubic root of 3947906 is about 158.0479745360.

The spelling of 3947906 in words is "three million, nine hundred forty-seven thousand, nine hundred six".