8443329840 has 200 divisors, whose sum is σ = 31991108688. Its totient is φ = 2046850560.

The previous prime is 8443329809. The next prime is 8443329841. The reversal of 8443329840 is 489233448.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8443329841) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 12054 + ... + 130506.

Almost surely, 2^8443329840 is an apocalyptic number.

8443329840 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 8443329840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15995554344).

8443329840 is an abundant number, since it is smaller than the sum of its proper divisors (23547778848).

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

8443329840 is a wasteful number, since it uses less digits than its factorization.

8443329840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118489 (or 118474 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The square root of 8443329840 is about 91887.5935042376. The cubic root of 8443329840 is about 2036.2819821396.

The spelling of 8443329840 in words is "eight billion, four hundred forty-three million, three hundred twenty-nine thousand, eight hundred forty".