9729120 has 48 divisors (see below), whose sum is σ = 30648240. Its totient is φ = 2594304.

The previous prime is 9729103. The next prime is 9729127. The reversal of 9729120 is 219279.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9729127) 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, 9655 + ... + 10614.

It is an arithmetic number, because the mean of its divisors is an integer number (638505).

Almost surely, 2^9729120 is an apocalyptic number.

It is an amenable number.

9729120 is an abundant number, since it is smaller than the sum of its proper divisors (20919120).

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

9729120 is a wasteful number, since it uses less digits than its factorization.

9729120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20287 (or 20279 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 9729120 is about 3119.1537313829. The cubic root of 9729120 is about 213.4803240446.

The spelling of 9729120 in words is "nine million, seven hundred twenty-nine thousand, one hundred twenty".