2788209 has 16 divisors (see below), whose sum is σ = 4243840. Its totient is φ = 1807920.

The previous prime is 2788199. The next prime is 2788213. The reversal of 2788209 is 9028872.

2788209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2788209 - 2⁷ = 2788081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2788309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397 + ... + 2394.

It is an arithmetic number, because the mean of its divisors is an integer number (265240).

2^2788209 is an apocalyptic number.

It is an amenable number.

2788209 is a deficient number, since it is larger than the sum of its proper divisors (1455631).

2788209 is a wasteful number, since it uses less digits than its factorization.

2788209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837 (or 2831 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 2788209 is about 1669.7931009559. The cubic root of 2788209 is about 140.7478517550.

The spelling of 2788209 in words is "two million, seven hundred eighty-eight thousand, two hundred nine".