2321808 has 20 divisors (see below), whose sum is σ = 5998128. Its totient is φ = 773920.

The previous prime is 2321791. The next prime is 2321821. The reversal of 2321808 is 8081232.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24138 + ... + 24233.

2^2321808 is an apocalyptic number.

It is an amenable number.

2321808 is an abundant number, since it is smaller than the sum of its proper divisors (3676320).

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

2321808 is a wasteful number, since it uses less digits than its factorization.

2321808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48382 (or 48376 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 2321808 is about 1523.7480106632. The cubic root of 2321808 is about 132.4164989494.

Adding to 2321808 its product of nonzero digits (768), we get a square (2322576 = 1524²).

The spelling of 2321808 in words is "two million, three hundred twenty-one thousand, eight hundred eight".