3866709 has 32 divisors (see below), whose sum is σ = 6773760. Its totient is φ = 1900800.

The previous prime is 3866651. The next prime is 3866713. The reversal of 3866709 is 9076683.

It is not a de Polignac number, because 3866709 - 2⁷ = 3866581 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

3866709 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3866719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3949 + ... + 4829.

It is an arithmetic number, because the mean of its divisors is an integer number (211680).

Almost surely, 2^3866709 is an apocalyptic number.

It is an amenable number.

3866709 is a deficient number, since it is larger than the sum of its proper divisors (2907051).

3866709 is a wasteful number, since it uses less digits than its factorization.

3866709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 3866709 is about 1966.3949247290. The cubic root of 3866709 is about 156.9569303200.

The spelling of 3866709 in words is "three million, eight hundred sixty-six thousand, seven hundred nine".