8204409 has 24 divisors (see below), whose sum is σ = 12943840. Its totient is φ = 5178816.

The previous prime is 8204389. The next prime is 8204423. The reversal of 8204409 is 9044028.

It is not a de Polignac number, because 8204409 - 2⁷ = 8204281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8204479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3729 + ... + 5505.

Almost surely, 2^8204409 is an apocalyptic number.

It is an amenable number.

8204409 is a deficient number, since it is larger than the sum of its proper divisors (4739431).

8204409 is a wasteful number, since it uses less digits than its factorization.

8204409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811 (or 1799 counting only the distinct ones).

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

The square root of 8204409 is about 2864.3339539935. Note that the first 3 decimals coincide. The cubic root of 8204409 is about 201.6891028321.

The spelling of 8204409 in words is "eight million, two hundred four thousand, four hundred nine".