8408409 has 16 divisors (see below), whose sum is σ = 12079104. Its totient is φ = 5187600.

The previous prime is 8408401. The next prime is 8408429. The reversal of 8408409 is 9048048.

It is not a de Polignac number, because 8408409 - 2³ = 8408401 is a prime.

It is a super-2 number, since 2×8408409² = 141402683822562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8408409.

It is not an unprimeable number, because it can be changed into a prime (8408401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174 + ... + 4104.

It is an arithmetic number, because the mean of its divisors is an integer number (754944).

Almost surely, 2^8408409 is an apocalyptic number.

It is an amenable number.

8408409 is a deficient number, since it is larger than the sum of its proper divisors (3670695).

8408409 is a wasteful number, since it uses less digits than its factorization.

8408409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 8408409 is about 2899.7256766805. The cubic root of 8408409 is about 203.3470810974.

The spelling of 8408409 in words is "eight million, four hundred eight thousand, four hundred nine".