3856867 has 16 divisors (see below), whose sum is σ = 4746240. Its totient is φ = 3060288.

The previous prime is 3856861. The next prime is 3856873. The reversal of 3856867 is 7686583.

It is an interprime number because it is at equal distance from previous prime (3856861) and next prime (3856873).

It is not a de Polignac number, because 3856867 - 2¹⁹ = 3332579 is a prime.

It is a Duffinian number.

3856867 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3856861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5943 + ... + 6559.

It is an arithmetic number, because the mean of its divisors is an integer number (296640).

Almost surely, 2^3856867 is an apocalyptic number.

3856867 is a deficient number, since it is larger than the sum of its proper divisors (889373).

3856867 is a wasteful number, since it uses less digits than its factorization.

3856867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690.

The product of its digits is 241920, while the sum is 43.

The square root of 3856867 is about 1963.8907810772. The cubic root of 3856867 is about 156.8236487958.

The spelling of 3856867 in words is "three million, eight hundred fifty-six thousand, eight hundred sixty-seven".