3869987 has 16 divisors (see below), whose sum is σ = 4406400. Its totient is φ = 3368640.

The previous prime is 3869959. The next prime is 3869989. The reversal of 3869987 is 7899683.

3869987 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 3869987 - 2²⁰ = 2821411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3869989) 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 15 ways as a sum of consecutive naturals, for example, 43439 + ... + 43527.

It is an arithmetic number, because the mean of its divisors is an integer number (275400).

Almost surely, 2^3869987 is an apocalyptic number.

3869987 is a deficient number, since it is larger than the sum of its proper divisors (536413).

3869987 is a wasteful number, since it uses less digits than its factorization.

3869987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226.

The product of its digits is 653184, while the sum is 50.

The square root of 3869987 is about 1967.2282531521. The cubic root of 3869987 is about 157.0012711704.

The spelling of 3869987 in words is "three million, eight hundred sixty-nine thousand, nine hundred eighty-seven".