9813728 has 24 divisors (see below), whose sum is σ = 20338920. Its totient is φ = 4648320.

The previous prime is 9813703. The next prime is 9813731. The reversal of 9813728 is 8273189.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9813691 and 9813700.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7463 + ... + 8678.

It is an arithmetic number, because the mean of its divisors is an integer number (847455).

Almost surely, 2^9813728 is an apocalyptic number.

It is an amenable number.

9813728 is an abundant number, since it is smaller than the sum of its proper divisors (10525192).

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

9813728 is a wasteful number, since it uses less digits than its factorization.

9813728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16170 (or 16162 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 9813728 is about 3132.6870255421. The cubic root of 9813728 is about 214.0973732198.

The spelling of 9813728 in words is "nine million, eight hundred thirteen thousand, seven hundred twenty-eight".