9957128 has 16 divisors (see below), whose sum is σ = 18755280. Its totient is φ = 4955728.

The previous prime is 9957109. The next prime is 9957133. The reversal of 9957128 is 8217599.

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, 926 + ... + 4557.

It is an arithmetic number, because the mean of its divisors is an integer number (1172205).

Almost surely, 2^9957128 is an apocalyptic number.

It is an amenable number.

9957128 is a deficient number, since it is larger than the sum of its proper divisors (8798152).

9957128 is a wasteful number, since it uses less digits than its factorization.

9957128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5716 (or 5712 counting only the distinct ones).

The product of its digits is 45360, while the sum is 41.

The square root of 9957128 is about 3155.4917207941. The cubic root of 9957128 is about 215.1351448867.

It can be divided in two parts, 99571 and 28, that added together give a palindrome (99599).

The spelling of 9957128 in words is "nine million, nine hundred fifty-seven thousand, one hundred twenty-eight".