2259840 has 128 divisors (see below), whose sum is σ = 7931520. Its totient is φ = 542720.

The previous prime is 2259833. The next prime is 2259847. The reversal of 2259840 is 489522.

It is an interprime number because it is at equal distance from previous prime (2259833) and next prime (2259847).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2259798 and 2259807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2259847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21067 + ... + 21173.

It is an arithmetic number, because the mean of its divisors is an integer number (61965).

2^2259840 is an apocalyptic number.

2259840 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 2259840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3965760).

2259840 is an abundant number, since it is smaller than the sum of its proper divisors (5671680).

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

2259840 is a wasteful number, since it uses less digits than its factorization.

2259840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 2259840 is about 1503.2764216870. The cubic root of 2259840 is about 131.2278148444.

The spelling of 2259840 in words is "two million, two hundred fifty-nine thousand, eight hundred forty".