2099844 has 30 divisors (see below), whose sum is σ = 5490254. Its totient is φ = 699840.

The previous prime is 2099837. The next prime is 2099863. The reversal of 2099844 is 4489902.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2073600 + 26244 = 1440^2 + 162^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2099799 and 2099808.

It is an unprimeable number.

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 in 9 ways as a sum of consecutive naturals, for example, 2917 + ... + 3564.

2^2099844 is an apocalyptic number.

It is an amenable number.

2099844 is an abundant number, since it is smaller than the sum of its proper divisors (3390410).

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

2099844 is a wasteful number, since it uses less digits than its factorization.

2099844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6497 (or 6486 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 2099844 is about 1449.0838485057. The cubic root of 2099844 is about 128.0547454623.

The spelling of 2099844 in words is "two million, ninety-nine thousand, eight hundred forty-four".