8816409 has 12 divisors (see below), whose sum is σ = 14554176. Its totient is φ = 5037912.

The previous prime is 8816359. The next prime is 8816447. The reversal of 8816409 is 9046188.

It is a happy number.

8816409 is a `hidden beast` number, since 8 + 8 + 1 + 640 + 9 = 666.

It is not a de Polignac number, because 8816409 - 2⁷ = 8816281 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8816449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69909 + ... + 70034.

It is an arithmetic number, because the mean of its divisors is an integer number (1212848).

Almost surely, 2^8816409 is an apocalyptic number.

It is an amenable number.

8816409 is a deficient number, since it is larger than the sum of its proper divisors (5737767).

8816409 is a wasteful number, since it uses less digits than its factorization.

8816409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139956 (or 139953 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 8816409 is about 2969.2438431358. The cubic root of 8816409 is about 206.5842667808.

The spelling of 8816409 in words is "eight million, eight hundred sixteen thousand, four hundred nine".