2889865 has 8 divisors (see below), whose sum is σ = 3783168. Its totient is φ = 2101680.

The previous prime is 2889863. The next prime is 2889869. The reversal of 2889865 is 5689882.

It is a happy number.

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

It is not a de Polignac number, because 2889865 - 2¹ = 2889863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2889863) 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, 26217 + ... + 26326.

It is an arithmetic number, because the mean of its divisors is an integer number (472896).

2^2889865 is an apocalyptic number.

It is an amenable number.

2889865 is a deficient number, since it is larger than the sum of its proper divisors (893303).

2889865 is a wasteful number, since it uses less digits than its factorization.

2889865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52559.

The product of its digits is 276480, while the sum is 46.

The square root of 2889865 is about 1699.9602936539. The cubic root of 2889865 is about 142.4379949796.

It can be divided in two parts, 288 and 9865, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 2889865 in words is "two million, eight hundred eighty-nine thousand, eight hundred sixty-five".