2289840 has 160 divisors (see below), whose sum is σ = 8570880. Its totient is φ = 494592.

The previous prime is 2289839. The next prime is 2289841. The reversal of 2289840 is 489822.

It is an interprime number because it is at equal distance from previous prime (2289839) and next prime (2289841).

It is not an unprimeable number, because it can be changed into a prime (2289841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48697 + ... + 48743.

It is an arithmetic number, because the mean of its divisors is an integer number (53568).

2^2289840 is an apocalyptic number.

2289840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2289840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4285440).

2289840 is an abundant number, since it is smaller than the sum of its proper divisors (6281040).

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

2289840 is a wasteful number, since it uses less digits than its factorization.

2289840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 2289840 is about 1513.2217286307. The cubic root of 2289840 is about 131.8059591593.

The spelling of 2289840 in words is "two million, two hundred eighty-nine thousand, eight hundred forty".