9978798 has 8 divisors (see below), whose sum is σ = 19957608. Its totient is φ = 3326264.

The previous prime is 9978791. The next prime is 9978799. The reversal of 9978798 is 8978799.

It is a happy number.

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

9978798 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 831561 + ... + 831572.

It is an arithmetic number, because the mean of its divisors is an integer number (2494701).

Almost surely, 2^9978798 is an apocalyptic number.

9978798 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.

9978798 is a wasteful number, since it uses less digits than its factorization.

9978798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663138.

The product of its digits is 2286144, while the sum is 57.

The square root of 9978798 is about 3158.9235508318. The cubic root of 9978798 is about 215.2911001873.

Subtracting from 9978798 its reverse (8978799), we obtain a palindrome (999999).

The spelling of 9978798 in words is "nine million, nine hundred seventy-eight thousand, seven hundred ninety-eight".