9928138 has 8 divisors (see below), whose sum is σ = 16246080. Its totient is φ = 4512780.

The previous prime is 9928133. The next prime is 9928151. The reversal of 9928138 is 8318299.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 9928138.

It is not an unprimeable number, because it can be changed into a prime (9928133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225618 + ... + 225661.

It is an arithmetic number, because the mean of its divisors is an integer number (2030760).

Almost surely, 2^9928138 is an apocalyptic number.

9928138 is a deficient number, since it is larger than the sum of its proper divisors (6317942).

9928138 is a wasteful number, since it uses less digits than its factorization.

9928138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451292.

The product of its digits is 31104, while the sum is 40.

The square root of 9928138 is about 3150.8947935467. The cubic root of 9928138 is about 214.9261545565.

The spelling of 9928138 in words is "nine million, nine hundred twenty-eight thousand, one hundred thirty-eight".