3906205 has 8 divisors (see below), whose sum is σ = 4891392. Its totient is φ = 2989008.

The previous prime is 3906187. The next prime is 3906247. The reversal of 3906205 is 5026093.

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

It is a cyclic number.

It is not a de Polignac number, because 3906205 - 2⁵ = 3906173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3906205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16869 + ... + 17098.

It is an arithmetic number, because the mean of its divisors is an integer number (611424).

Almost surely, 2^3906205 is an apocalyptic number.

It is an amenable number.

3906205 is a deficient number, since it is larger than the sum of its proper divisors (985187).

3906205 is a wasteful number, since it uses less digits than its factorization.

3906205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33995.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 3906205 is about 1976.4121533729. The cubic root of 3906205 is about 157.4895264724.

It can be divided in two parts, 390620 and 5, that added together give a 8-th power (390625 = 5⁸).

The spelling of 3906205 in words is "three million, nine hundred six thousand, two hundred five".