2109830 has 24 divisors (see below), whose sum is σ = 3937248. Its totient is φ = 813648.

The previous prime is 2109799. The next prime is 2109841. The reversal of 2109830 is 389012.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2109796 and 2109805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31457 + ... + 31523.

It is an arithmetic number, because the mean of its divisors is an integer number (164052).

2^2109830 is an apocalyptic number.

2109830 is a deficient number, since it is larger than the sum of its proper divisors (1827418).

2109830 is an equidigital number, since it uses as much as digits as its factorization.

2109830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2109830 is about 1452.5253870415. The cubic root of 2109830 is about 128.2574165414.

The spelling of 2109830 in words is "two million, one hundred nine thousand, eight hundred thirty".