9988447392 has 288 divisors, whose sum is σ = 36599472000. Its totient is φ = 2594211840.

The previous prime is 9988447333. The next prime is 9988447423. The reversal of 9988447392 is 2937448899.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 724984 + ... + 738632.

It is an arithmetic number, because the mean of its divisors is an integer number (127081500).

Almost surely, 2^9988447392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9988447392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18299736000).

9988447392 is an abundant number, since it is smaller than the sum of its proper divisors (26611024608).

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

9988447392 is a wasteful number, since it uses less digits than its factorization.

9988447392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13697 (or 13672 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The square root of 9988447392 is about 99942.2202675126. The cubic root of 9988447392 is about 2153.6047256935.

The spelling of 9988447392 in words is "nine billion, nine hundred eighty-eight million, four hundred forty-seven thousand, three hundred ninety-two".