440705009 has 4 divisors (see below), whose sum is σ = 441222516. Its totient is φ = 440187504.

The previous prime is 440705003. The next prime is 440705033. The reversal of 440705009 is 900507044.

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 134560000 + 306145009 = 11600^2 + 17497^2 .

It is a cyclic number.

It is not a de Polignac number, because 440705009 - 2²⁰ = 439656433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440705003) 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, 257474 + ... + 259179.

It is an arithmetic number, because the mean of its divisors is an integer number (110305629).

Almost surely, 2^440705009 is an apocalyptic number.

It is an amenable number.

440705009 is a deficient number, since it is larger than the sum of its proper divisors (517507).

440705009 is an equidigital number, since it uses as much as digits as its factorization.

440705009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517506.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 440705009 is about 20992.9752298239. The cubic root of 440705009 is about 760.9965050321.

The spelling of 440705009 in words is "four hundred forty million, seven hundred five thousand, nine".