449005809 has 16 divisors (see below), whose sum is σ = 685935488. Its totient is φ = 255923712.

The previous prime is 449005789. The next prime is 449005849. The reversal of 449005809 is 908500944.

It is not a de Polignac number, because 449005809 - 2¹¹ = 449003761 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (449005849) 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, 18592 + ... + 35265.

It is an arithmetic number, because the mean of its divisors is an integer number (42870968).

Almost surely, 2^449005809 is an apocalyptic number.

It is an amenable number.

449005809 is a deficient number, since it is larger than the sum of its proper divisors (236929679).

449005809 is a wasteful number, since it uses less digits than its factorization.

449005809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54264.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 449005809 is about 21189.7571718036. The cubic root of 449005809 is about 765.7446770665.

The spelling of 449005809 in words is "four hundred forty-nine million, five thousand, eight hundred nine".