9729280 has 72 divisors (see below), whose sum is σ = 25460064. Its totient is φ = 3532800.

The previous prime is 9729241. The next prime is 9729283. The reversal of 9729280 is 829279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9729283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13735 + ... + 14425.

It is an arithmetic number, because the mean of its divisors is an integer number (353612).

Almost surely, 2^9729280 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 9729280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12730032).

9729280 is an abundant number, since it is smaller than the sum of its proper divisors (15730784).

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

9729280 is a wasteful number, since it uses less digits than its factorization.

9729280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 9729280 is about 3119.1793792599. The cubic root of 9729280 is about 213.4814942999.

The spelling of 9729280 in words is "nine million, seven hundred twenty-nine thousand, two hundred eighty".