3906806 has 16 divisors (see below), whose sum is σ = 6154368. Its totient is φ = 1857600.

The previous prime is 3906797. The next prime is 3906809. The reversal of 3906806 is 6086093.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3906809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3266 + ... + 4298.

It is an arithmetic number, because the mean of its divisors is an integer number (384648).

Almost surely, 2^3906806 is an apocalyptic number.

3906806 is a deficient number, since it is larger than the sum of its proper divisors (2247562).

3906806 is a wasteful number, since it uses less digits than its factorization.

3906806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 3906806 is about 1976.5641907107. The cubic root of 3906806 is about 157.4976030541.

The spelling of 3906806 in words is "three million, nine hundred six thousand, eight hundred six".