3936809 has 8 divisors (see below), whose sum is σ = 4186368. Its totient is φ = 3689280.

The previous prime is 3936799. The next prime is 3936811. The reversal of 3936809 is 9086393.

It is a happy number.

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 3936809 - 2¹² = 3932713 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3936839) 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, 5924 + ... + 6554.

It is an arithmetic number, because the mean of its divisors is an integer number (523296).

Almost surely, 2^3936809 is an apocalyptic number.

It is an amenable number.

3936809 is a deficient number, since it is larger than the sum of its proper divisors (249559).

3936809 is a wasteful number, since it uses less digits than its factorization.

3936809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 3936809 is about 1984.1393600249. The cubic root of 3936809 is about 157.8997521428.

The spelling of 3936809 in words is "three million, nine hundred thirty-six thousand, eight hundred nine".