2289918 has 32 divisors (see below), whose sum is σ = 4924800. Its totient is φ = 707616.

The previous prime is 2289901. The next prime is 2289919. The reversal of 2289918 is 8199822.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2289919) by changing a digit.

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, 5853 + ... + 6231.

It is an arithmetic number, because the mean of its divisors is an integer number (153900).

2^2289918 is an apocalyptic number.

2289918 is an abundant number, since it is smaller than the sum of its proper divisors (2634882).

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

2289918 is a wasteful number, since it uses less digits than its factorization.

2289918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456.

The product of its digits is 20736, while the sum is 39.

The square root of 2289918 is about 1513.2475012370. The cubic root of 2289918 is about 131.8074557337.

The spelling of 2289918 in words is "two million, two hundred eighty-nine thousand, nine hundred eighteen".