9978272 has 12 divisors (see below), whose sum is σ = 19644786. Its totient is φ = 4989120.

The previous prime is 9978229. The next prime is 9978277. The reversal of 9978272 is 2728799.

It can be written as a sum of positive squares in only one way, i.e., 9265936 + 712336 = 3044^2 + 844^2 .

It is not an unprimeable number, because it can be changed into a prime (9978277) 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 as a sum of consecutive naturals, namely, 155879 + ... + 155942.

Almost surely, 2^9978272 is an apocalyptic number.

It is an amenable number.

9978272 is a deficient number, since it is larger than the sum of its proper divisors (9666514).

9978272 is a wasteful number, since it uses less digits than its factorization.

9978272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311831 (or 311823 counting only the distinct ones).

The product of its digits is 127008, while the sum is 44.

The square root of 9978272 is about 3158.8402935255. The cubic root of 9978272 is about 215.2873173299.

The spelling of 9978272 in words is "nine million, nine hundred seventy-eight thousand, two hundred seventy-two".