9947432448 has 280 divisors, whose sum is σ = 30860636400. Its totient is φ = 3197988864.

The previous prime is 9947432441. The next prime is 9947432471. The reversal of 9947432448 is 8442347499.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 9947432394 and 9947432403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9947432441) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 10823733 + ... + 10824651.

Almost surely, 2^9947432448 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 9947432448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15430318200).

9947432448 is an abundant number, since it is smaller than the sum of its proper divisors (20913203952).

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

9947432448 is an frugal number, since it uses more digits than its factorization.

9947432448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984 (or 953 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The square root of 9947432448 is about 99736.8159106756. The cubic root of 9947432448 is about 2150.6529437791.

The spelling of 9947432448 in words is "nine billion, nine hundred forty-seven million, four hundred thirty-two thousand, four hundred forty-eight".