3946209 has 8 divisors (see below), whose sum is σ = 5390112. Its totient is φ = 2566560.

The previous prime is 3946183. The next prime is 3946211. The reversal of 3946209 is 9026493.

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

It is not a de Polignac number, because 3946209 - 2⁵ = 3946177 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3946209.

It is not an unprimeable number, because it can be changed into a prime (3946219) 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, 15919 + ... + 16164.

It is an arithmetic number, because the mean of its divisors is an integer number (673764).

Almost surely, 2^3946209 is an apocalyptic number.

It is an amenable number.

3946209 is a deficient number, since it is larger than the sum of its proper divisors (1443903).

3946209 is a wasteful number, since it uses less digits than its factorization.

3946209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32127.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 3946209 is about 1986.5067329360. The cubic root of 3946209 is about 158.0253257486.

It can be divided in two parts, 39 and 46209, that multiplied together give a triangular number (1802151 = T₁₈₉₈).

The spelling of 3946209 in words is "three million, nine hundred forty-six thousand, two hundred nine".