2291808 has 24 divisors (see below), whose sum is σ = 6016248. Its totient is φ = 763904.

The previous prime is 2291803. The next prime is 2291827. The reversal of 2291808 is 8081922.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11841 + ... + 12032.

It is an arithmetic number, because the mean of its divisors is an integer number (250677).

2^2291808 is an apocalyptic number.

It is an amenable number.

2291808 is an abundant number, since it is smaller than the sum of its proper divisors (3724440).

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

2291808 is a wasteful number, since it uses less digits than its factorization.

2291808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23886 (or 23878 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 2291808 is about 1513.8718571927. The cubic root of 2291808 is about 131.8437085000.

The spelling of 2291808 in words is "two million, two hundred ninety-one thousand, eight hundred eight".