2804409 has 8 divisors (see below), whose sum is σ = 4154720. Its totient is φ = 1869588.

The previous prime is 2804407. The next prime is 2804411. The reversal of 2804409 is 9044082.

It is an interprime number because it is at equal distance from previous prime (2804407) and next prime (2804411).

It is not a de Polignac number, because 2804409 - 2¹ = 2804407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 103867 = 2804409 / (2 + 8 + 0 + 4 + 4 + 0 + 9).

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2804407) 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, 51907 + ... + 51960.

It is an arithmetic number, because the mean of its divisors is an integer number (519340).

2^2804409 is an apocalyptic number.

It is an amenable number.

2804409 is a deficient number, since it is larger than the sum of its proper divisors (1350311).

2804409 is a wasteful number, since it uses less digits than its factorization.

2804409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103876 (or 103870 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 2804409 is about 1674.6369755861. The cubic root of 2804409 is about 141.0199157020.

The spelling of 2804409 in words is "two million, eight hundred four thousand, four hundred nine".