9728040 has 128 divisors (see below), whose sum is σ = 34364160. Its totient is φ = 2156544.

The previous prime is 9728039. The next prime is 9728051. The reversal of 9728040 is 408279.

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

It is a junction number, because it is equal to n+sod(n) for n = 9727989 and 9728007.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30924 + ... + 31236.

It is an arithmetic number, because the mean of its divisors is an integer number (268470).

Almost surely, 2^9728040 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 9728040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17182080).

9728040 is an abundant number, since it is smaller than the sum of its proper divisors (24636120).

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

9728040 is a wasteful number, since it uses less digits than its factorization.

9728040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 9728040 is about 3118.9806026970. The cubic root of 9728040 is about 213.4724244853.

The spelling of 9728040 in words is "nine million, seven hundred twenty-eight thousand, forty".