3867855 has 8 divisors (see below), whose sum is σ = 6188592. Its totient is φ = 2062848.

The previous prime is 3867847. The next prime is 3867859. The reversal of 3867855 is 5587683.

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

It is not a de Polignac number, because 3867855 - 2³ = 3867847 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

3867855 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3867859) 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, 128914 + ... + 128943.

It is an arithmetic number, because the mean of its divisors is an integer number (773574).

Almost surely, 2^3867855 is an apocalyptic number.

3867855 is a deficient number, since it is larger than the sum of its proper divisors (2320737).

3867855 is a wasteful number, since it uses less digits than its factorization.

3867855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257865.

The product of its digits is 201600, while the sum is 42.

The square root of 3867855 is about 1966.6862993370. The cubic root of 3867855 is about 156.9724348809.

The spelling of 3867855 in words is "three million, eight hundred sixty-seven thousand, eight hundred fifty-five".