9729420 has 48 divisors (see below), whose sum is σ = 27433728. Its totient is φ = 2576320.

The previous prime is 9729397. The next prime is 9729427. The reversal of 9729420 is 249279.

It is a super-2 number, since 2×9729420² = 189323227072800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9729427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9535 + ... + 10505.

It is an arithmetic number, because the mean of its divisors is an integer number (571536).

Almost surely, 2^9729420 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 9729420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13716864).

9729420 is an abundant number, since it is smaller than the sum of its proper divisors (17704308).

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

9729420 is a wasteful number, since it uses less digits than its factorization.

9729420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150 (or 1148 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 9729420 is about 3119.2018209792. The cubic root of 9729420 is about 213.4825182629.

The spelling of 9729420 in words is "nine million, seven hundred twenty-nine thousand, four hundred twenty".