9940728 has 96 divisors (see below), whose sum is σ = 29548800. Its totient is φ = 2778048.

The previous prime is 9940717. The next prime is 9940729. The reversal of 9940728 is 8270499.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9940729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92851 + ... + 92957.

It is an arithmetic number, because the mean of its divisors is an integer number (307800).

Almost surely, 2^9940728 is an apocalyptic number.

9940728 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9940728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14774400).

9940728 is an abundant number, since it is smaller than the sum of its proper divisors (19608072).

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

9940728 is a wasteful number, since it uses less digits than its factorization.

9940728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 9940728 is about 3152.8920057623. The cubic root of 9940728 is about 215.0169663914.

The spelling of 9940728 in words is "nine million, nine hundred forty thousand, seven hundred twenty-eight".