8444398864 has 40 divisors (see below), whose sum is σ = 17957948832. Its totient is φ = 3814801920.

The previous prime is 8444398861. The next prime is 8444398873. The reversal of 8444398864 is 4688934448.

It is a junction number, because it is equal to n+sod(n) for n = 8444398799 and 8444398808.

It is not an unprimeable number, because it can be changed into a prime (8444398861) 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 7 ways as a sum of consecutive naturals, for example, 118489 + ... + 175864.

Almost surely, 2^8444398864 is an apocalyptic number.

It is an amenable number.

8444398864 is an abundant number, since it is smaller than the sum of its proper divisors (9513549968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8444398864 is a wasteful number, since it uses less digits than its factorization.

8444398864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294535 (or 294529 counting only the distinct ones).

The product of its digits is 21233664, while the sum is 58.

The square root of 8444398864 is about 91893.4103404591. The cubic root of 8444398864 is about 2036.3679175264.

The spelling of 8444398864 in words is "eight billion, four hundred forty-four million, three hundred ninety-eight thousand, eight hundred sixty-four".