2289865 has 8 divisors (see below), whose sum is σ = 2800008. Its totient is φ = 1797120.

The previous prime is 2289863. The next prime is 2289871. The reversal of 2289865 is 5689822.

It can be written as a sum of positive squares in 4 ways, for example, as 36864 + 2253001 = 192^2 + 1501^2 .

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

It is not a de Polignac number, because 2289865 - 2¹ = 2289863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2289863) 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, 4056 + ... + 4585.

It is an arithmetic number, because the mean of its divisors is an integer number (350001).

2^2289865 is an apocalyptic number.

It is an amenable number.

2289865 is a deficient number, since it is larger than the sum of its proper divisors (510143).

2289865 is an equidigital number, since it uses as much as digits as its factorization.

2289865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8699.

The product of its digits is 69120, while the sum is 40.

The square root of 2289865 is about 1513.2299891292. The cubic root of 2289865 is about 131.8064388343.

The spelling of 2289865 in words is "two million, two hundred eighty-nine thousand, eight hundred sixty-five".