2289812 has 24 divisors (see below), whose sum is σ = 4669056. Its totient is φ = 962208.

The previous prime is 2289803. The next prime is 2289817. The reversal of 2289812 is 2189822.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 713 + ... + 2255.

It is an arithmetic number, because the mean of its divisors is an integer number (194544).

2^2289812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2289812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2334528).

2289812 is an abundant number, since it is smaller than the sum of its proper divisors (2379244).

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

2289812 is a wasteful number, since it uses less digits than its factorization.

2289812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607 (or 1605 counting only the distinct ones).

The product of its digits is 4608, while the sum is 32.

The square root of 2289812 is about 1513.2124768188. The cubic root of 2289812 is about 131.8054219191.

The spelling of 2289812 in words is "two million, two hundred eighty-nine thousand, eight hundred twelve".