2243808 has 144 divisors (see below), whose sum is σ = 7756560. Its totient is φ = 628992.

The previous prime is 2243803. The next prime is 2243809. The reversal of 2243808 is 8083422.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2243803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42310 + ... + 42362.

It is an arithmetic number, because the mean of its divisors is an integer number (53865).

2^2243808 is an apocalyptic number.

2243808 is a gapful number since it is divisible by the number (28) 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 2243808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3878280).

2243808 is an abundant number, since it is smaller than the sum of its proper divisors (5512752).

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

2243808 is a wasteful number, since it uses less digits than its factorization.

2243808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 2243808 is about 1497.9345780107. The cubic root of 2243808 is about 130.9167546018.

The spelling of 2243808 in words is "two million, two hundred forty-three thousand, eight hundred eight".