2289818 has 12 divisors (see below), whose sum is σ = 3516702. Its totient is φ = 1117920.

The previous prime is 2289817. The next prime is 2289829. The reversal of 2289818 is 8189822.

It can be written as a sum of positive squares in 3 ways, for example, as 1545049 + 744769 = 1243^2 + 863^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2289817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16646 + ... + 16782.

2^2289818 is an apocalyptic number.

2289818 is a deficient number, since it is larger than the sum of its proper divisors (1226884).

2289818 is an equidigital number, since it uses as much as digits as its factorization.

2289818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 200 counting only the distinct ones).

The product of its digits is 18432, while the sum is 38.

The square root of 2289818 is about 1513.2144593547. The cubic root of 2289818 is about 131.8055370424.

It can be divided in two parts, 22898 and 18, that multiplied together give a square (412164 = 642²).

The spelling of 2289818 in words is "two million, two hundred eighty-nine thousand, eight hundred eighteen".