2099784 has 16 divisors (see below), whose sum is σ = 5249520. Its totient is φ = 699920.

The previous prime is 2099771. The next prime is 2099809. The reversal of 2099784 is 4879902.

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 3 ways as a sum of consecutive naturals, for example, 43722 + ... + 43769.

It is an arithmetic number, because the mean of its divisors is an integer number (328095).

2^2099784 is an apocalyptic number.

2099784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2099784 is an abundant number, since it is smaller than the sum of its proper divisors (3149736).

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

2099784 is a wasteful number, since it uses less digits than its factorization.

2099784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87500 (or 87496 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 2099784 is about 1449.0631456220. The cubic root of 2099784 is about 128.0535257911.

Subtracting from 2099784 its product of nonzero digits (36288), we obtain a triangular number (2063496 = T₂₀₃₁).

The spelling of 2099784 in words is "two million, ninety-nine thousand, seven hundred eighty-four".