9429697728 has 448 divisors, whose sum is σ = 31543142400. Its totient is φ = 2737566720.

The previous prime is 9429697621. The next prime is 9429697729. The reversal of 9429697728 is 8277969249.

It is not an unprimeable number, because it can be changed into a prime (9429697729) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 67839483 + ... + 67839621.

It is an arithmetic number, because the mean of its divisors is an integer number (70408800).

Almost surely, 2^9429697728 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 9429697728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15771571200).

9429697728 is an abundant number, since it is smaller than the sum of its proper divisors (22113444672).

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

9429697728 is a wasteful number, since it uses less digits than its factorization.

9429697728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 281 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The square root of 9429697728 is about 97106.6307107810. The cubic root of 9429697728 is about 2112.6745004738.

The spelling of 9429697728 in words is "nine billion, four hundred twenty-nine million, six hundred ninety-seven thousand, seven hundred twenty-eight".