3886865 has 4 divisors (see below), whose sum is σ = 4664244. Its totient is φ = 3109488.

The previous prime is 3886847. The next prime is 3886867. The reversal of 3886865 is 5686883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5686883 = 149 ⋅38167.

It can be written as a sum of positive squares in 2 ways, for example, as 2289169 + 1597696 = 1513^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 3886865 - 2⁶ = 3886801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3886867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388682 + ... + 388691.

It is an arithmetic number, because the mean of its divisors is an integer number (1166061).

Almost surely, 2^3886865 is an apocalyptic number.

It is an amenable number.

3886865 is a deficient number, since it is larger than the sum of its proper divisors (777379).

3886865 is an equidigital number, since it uses as much as digits as its factorization.

3886865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777378.

The product of its digits is 276480, while the sum is 44.

The square root of 3886865 is about 1971.5133780931. The cubic root of 3886865 is about 157.2291810241.

The spelling of 3886865 in words is "three million, eight hundred eighty-six thousand, eight hundred sixty-five".