2867865 has 64 divisors (see below), whose sum is σ = 6193152. Its totient is φ = 1094400.

The previous prime is 2867861. The next prime is 2867867. The reversal of 2867865 is 5687682.

2867865 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 2867865 - 2² = 2867861 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2867861) 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 63 ways as a sum of consecutive naturals, for example, 14920 + ... + 15110.

It is an arithmetic number, because the mean of its divisors is an integer number (96768).

2^2867865 is an apocalyptic number.

It is an amenable number.

2867865 is an abundant number, since it is smaller than the sum of its proper divisors (3325287).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2867865 is a wasteful number, since it uses less digits than its factorization.

2867865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230.

The product of its digits is 161280, while the sum is 42.

The square root of 2867865 is about 1693.4771920519. The cubic root of 2867865 is about 142.0756226173.

The spelling of 2867865 in words is "two million, eight hundred sixty-seven thousand, eight hundred sixty-five".