8440220449 has 4 divisors (see below), whose sum is σ = 8541909936. Its totient is φ = 8338530964.

The previous prime is 8440220447. The next prime is 8440220491. The reversal of 8440220449 is 9440220448.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8440220449 - 2¹ = 8440220447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8440220447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50844619 + ... + 50844784.

It is an arithmetic number, because the mean of its divisors is an integer number (2135477484).

Almost surely, 2^8440220449 is an apocalyptic number.

It is an amenable number.

8440220449 is a deficient number, since it is larger than the sum of its proper divisors (101689487).

8440220449 is a wasteful number, since it uses less digits than its factorization.

8440220449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101689486.

The product of its (nonzero) digits is 73728, while the sum is 37.

The square root of 8440220449 is about 91870.6724096433. The cubic root of 8440220449 is about 2036.0319870001.

Subtracting 8440220449 from its reverse (9440220448), we obtain a palindrome (999999999).

The spelling of 8440220449 in words is "eight billion, four hundred forty million, two hundred twenty thousand, four hundred forty-nine".