9972798 has 32 divisors (see below), whose sum is σ = 22177152. Its totient is φ = 2964000.

The previous prime is 9972779. The next prime is 9972803. The reversal of 9972798 is 8972799.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 9972798.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2073 + ... + 4923.

It is an arithmetic number, because the mean of its divisors is an integer number (693036).

Almost surely, 2^9972798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9972798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11088576).

9972798 is an abundant number, since it is smaller than the sum of its proper divisors (12204354).

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

9972798 is a wasteful number, since it uses less digits than its factorization.

9972798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920.

The product of its digits is 571536, while the sum is 51.

The square root of 9972798 is about 3157.9737174334. The cubic root of 9972798 is about 215.2479418301.

Subtracting from 9972798 its reverse (8972799), we obtain a palindrome (999999).

The spelling of 9972798 in words is "nine million, nine hundred seventy-two thousand, seven hundred ninety-eight".