2089865 has 16 divisors (see below), whose sum is σ = 2634240. Its totient is φ = 1589760.

The previous prime is 2089859. The next prime is 2089873. The reversal of 2089865 is 5689802.

It is not a de Polignac number, because 2089865 - 2¹⁴ = 2073481 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14966 + ... + 15104.

It is an arithmetic number, because the mean of its divisors is an integer number (164640).

2^2089865 is an apocalyptic number.

It is an amenable number.

2089865 is a deficient number, since it is larger than the sum of its proper divisors (544375).

2089865 is a wasteful number, since it uses less digits than its factorization.

2089865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 2089865 is about 1445.6365379998. The cubic root of 2089865 is about 127.8515735594.

The spelling of 2089865 in words is "two million, eighty-nine thousand, eight hundred sixty-five".