2163808 has 12 divisors (see below), whose sum is σ = 4260060. Its totient is φ = 1081888.

The previous prime is 2163787. The next prime is 2163809. The reversal of 2163808 is 8083612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33778 + ... + 33841.

It is an arithmetic number, because the mean of its divisors is an integer number (355005).

2^2163808 is an apocalyptic number.

It is an amenable number.

2163808 is a deficient number, since it is larger than the sum of its proper divisors (2096252).

2163808 is an equidigital number, since it uses as much as digits as its factorization.

2163808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67629 (or 67621 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2163808 is about 1470.9887830980. The cubic root of 2163808 is about 129.3420005764.

The spelling of 2163808 in words is "two million, one hundred sixty-three thousand, eight hundred eight".