2100808 has 32 divisors (see below), whose sum is σ = 4181760. Its totient is φ = 987840.

The previous prime is 2100803. The next prime is 2100821. The reversal of 2100808 is 8080012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2100803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10566 + ... + 10762.

It is an arithmetic number, because the mean of its divisors is an integer number (130680).

2^2100808 is an apocalyptic number.

It is an amenable number.

2100808 is a deficient number, since it is larger than the sum of its proper divisors (2080952).

2100808 is a wasteful number, since it uses less digits than its factorization.

2100808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 2100808 is about 1449.4164342935. The cubic root of 2100808 is about 128.0743383287.

The spelling of 2100808 in words is "two million, one hundred thousand, eight hundred eight".