2243280 has 80 divisors (see below), whose sum is σ = 7499520. Its totient is φ = 551424.

The previous prime is 2243261. The next prime is 2243281. The reversal of 2243280 is 823422.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2243281) 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, 2761 + ... + 3479.

It is an arithmetic number, because the mean of its divisors is an integer number (93744).

2^2243280 is an apocalyptic number.

2243280 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 2243280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3749760).

2243280 is an abundant number, since it is smaller than the sum of its proper divisors (5256240).

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

2243280 is a wasteful number, since it uses less digits than its factorization.

2243280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2243280 is about 1497.7583249643. The cubic root of 2243280 is about 130.9064849369.

The spelling of 2243280 in words is "two million, two hundred forty-three thousand, two hundred eighty".