8440440447 has 16 divisors (see below), whose sum is σ = 11448594432. Its totient is φ = 5530452480.

The previous prime is 8440440431. The next prime is 8440440457. The reversal of 8440440447 is 7440440448.

It is not a de Polignac number, because 8440440447 - 2⁴ = 8440440431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8440440457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62754 + ... + 144287.

It is an arithmetic number, because the mean of its divisors is an integer number (715537152).

Almost surely, 2^8440440447 is an apocalyptic number.

8440440447 is a deficient number, since it is larger than the sum of its proper divisors (3008153985).

8440440447 is a wasteful number, since it uses less digits than its factorization.

8440440447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207278.

The product of its (nonzero) digits is 229376, while the sum is 39.

The square root of 8440440447 is about 91871.8697262660. The cubic root of 8440440447 is about 2036.0496768648.

Subtracting from 8440440447 its reverse (7440440448), we obtain a palindrome (999999999).

The spelling of 8440440447 in words is "eight billion, four hundred forty million, four hundred forty thousand, four hundred forty-seven".