9933978 has 8 divisors (see below), whose sum is σ = 19867968. Its totient is φ = 3311324.

The previous prime is 9933977. The next prime is 9933983. The reversal of 9933978 is 8793399.

9933978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

9933978 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9933971) 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, 827826 + ... + 827837.

It is an arithmetic number, because the mean of its divisors is an integer number (2483496).

Almost surely, 2^9933978 is an apocalyptic number.

9933978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9933978 is a wasteful number, since it uses less digits than its factorization.

9933978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655668.

The product of its digits is 367416, while the sum is 48.

The square root of 9933978 is about 3151.8213781875. The cubic root of 9933978 is about 214.9682880937.

The spelling of 9933978 in words is "nine million, nine hundred thirty-three thousand, nine hundred seventy-eight".