9997328 has 40 divisors (see below), whose sum is σ = 21638496.
Its totient is φ = 4435200.
The previous prime is 9997327. The next prime is 9997333. The reversal of 9997328 is 8237999.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (9997321) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6908 + ... + 8228.
Almost surely, 29997328 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 9997328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10819248).
9997328 is an abundant number, since it is smaller than the sum of its proper divisors (11641168).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
9997328 is a wasteful number, since it uses less digits than its factorization.
9997328 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1383 (or 1377 counting only the distinct ones).
The product of its digits is 244944, while the sum is 47.
The square root of 9997328 is about 3161.8551516475.
The cubic root of 9997328 is about 215.4242784622.
It can be divided in two parts, 99973 and 28, that added together give a palindrome (100001).
The spelling of 9997328 in words is "nine million, nine hundred ninety-seven thousand, three hundred twenty-eight".