9978608 has 20 divisors (see below), whose sum is σ = 19399800.
Its totient is φ = 4972224.
The previous prime is 9978607. The next prime is 9978613. The reversal of 9978608 is 8068799.
It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (9978601) 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, 4691 + ... + 6477.
It is an arithmetic number, because the mean of its divisors is an integer number (969990).
Almost surely, 29978608 is an apocalyptic number.
It is an amenable number.
9978608 is a deficient number, since it is larger than the sum of its proper divisors (9421192).
9978608 is a wasteful number, since it uses less digits than its factorization.
9978608 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2144 (or 2138 counting only the distinct ones).
The product of its (nonzero) digits is 217728, while the sum is 47.
The square root of 9978608 is about 3158.8934771530.
The cubic root of 9978608 is about 215.2897337713.
The spelling of 9978608 in words is "nine million, nine hundred seventy-eight thousand, six hundred eight".