8404444409 has 4 divisors (see below), whose sum is σ = 8609430900. Its totient is φ = 8199457920.

The previous prime is 8404444393. The next prime is 8404444463. The reversal of 8404444409 is 9044444048.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2401294009 + 6003150400 = 49003^2 + 77480^2 .

It is a cyclic number.

It is not a de Polignac number, because 8404444409 - 2⁴ = 8404444393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 204986449 = 8404444409 / (8 + 4 + 0 + 4 + 4 + 4 + 4 + 4 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8404444469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102493184 + ... + 102493265.

It is an arithmetic number, because the mean of its divisors is an integer number (2152357725).

Almost surely, 2^8404444409 is an apocalyptic number.

It is an amenable number.

8404444409 is a deficient number, since it is larger than the sum of its proper divisors (204986491).

8404444409 is a wasteful number, since it uses less digits than its factorization.

8404444409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204986490.

The product of its (nonzero) digits is 294912, while the sum is 41.

The square root of 8404444409 is about 91675.7569316992. The cubic root of 8404444409 is about 2033.1511647930.

The spelling of 8404444409 in words is "eight billion, four hundred four million, four hundred forty-four thousand, four hundred nine".