8444246640 has 80 divisors (see below), whose sum is σ = 26220324768. Its totient is φ = 2248086528.

The previous prime is 8444246639. The next prime is 8444246693. The reversal of 8444246640 is 466424448.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 8444246592 and 8444246601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118422 + ... + 175818.

Almost surely, 2^8444246640 is an apocalyptic number.

8444246640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8444246640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13110162384).

8444246640 is an abundant number, since it is smaller than the sum of its proper divisors (17776078128).

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

8444246640 is a wasteful number, since it uses less digits than its factorization.

8444246640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58026 (or 58020 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 42.

The square root of 8444246640 is about 91892.5820727658. The cubic root of 8444246640 is about 2036.3556811735.

The spelling of 8444246640 in words is "eight billion, four hundred forty-four million, two hundred forty-six thousand, six hundred forty".