9447748992 has 384 divisors, whose sum is σ = 31391193600. Its totient is φ = 2700472320.

The previous prime is 9447748957. The next prime is 9447749009. The reversal of 9447748992 is 2998477449.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×9447748992² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 17271663 + ... + 17272209.

It is an arithmetic number, because the mean of its divisors is an integer number (81747900).

Almost surely, 2^9447748992 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 9447748992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15695596800).

9447748992 is an abundant number, since it is smaller than the sum of its proper divisors (21943444608).

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

9447748992 is a wasteful number, since it uses less digits than its factorization.

9447748992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 639 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

The square root of 9447748992 is about 97199.5318507245. The cubic root of 9447748992 is about 2114.0217382907.

The spelling of 9447748992 in words is "nine billion, four hundred forty-seven million, seven hundred forty-eight thousand, nine hundred ninety-two".