3906855 has 24 divisors (see below), whose sum is σ = 7171632. Its totient is φ = 1960704.

The previous prime is 3906839. The next prime is 3906857. The reversal of 3906855 is 5586093.

It is not a de Polignac number, because 3906855 - 2⁴ = 3906839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3906857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1789 + ... + 3318.

It is an arithmetic number, because the mean of its divisors is an integer number (298818).

Almost surely, 2^3906855 is an apocalyptic number.

3906855 is a deficient number, since it is larger than the sum of its proper divisors (3264777).

3906855 is a wasteful number, since it uses less digits than its factorization.

3906855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135 (or 5132 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 3906855 is about 1976.5765859182. The cubic root of 3906855 is about 157.4982615076.

It can be divided in two parts, 3906 and 855, that added together give a square (4761 = 69²).

The spelling of 3906855 in words is "three million, nine hundred six thousand, eight hundred fifty-five".