3866859 has 12 divisors (see below), whose sum is σ = 5792696. Its totient is φ = 2577744.

The previous prime is 3866857. The next prime is 3866867. The reversal of 3866859 is 9586683.

3866859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3866859 - 2¹ = 3866857 is a prime.

It is a super-3 number, since 3×3866859³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

3866859 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3866857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7714 + ... + 8199.

Almost surely, 2^3866859 is an apocalyptic number.

3866859 is a deficient number, since it is larger than the sum of its proper divisors (1925837).

3866859 is an equidigital number, since it uses as much as digits as its factorization.

3866859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15928 (or 15916 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 3866859 is about 1966.4330652224. The cubic root of 3866859 is about 156.9589598871.

The spelling of 3866859 in words is "three million, eight hundred sixty-six thousand, eight hundred fifty-nine".