9978823722 has 32 divisors (see below), whose sum is σ = 22811990400. Its totient is φ = 2850686208.

The previous prime is 9978823721. The next prime is 9978823733. The reversal of 9978823722 is 2273288799.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9978823721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405054 + ... + 428982.

It is an arithmetic number, because the mean of its divisors is an integer number (712874700).

Almost surely, 2^9978823722 is an apocalyptic number.

9978823722 is an abundant number, since it is smaller than the sum of its proper divisors (12833166678).

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

9978823722 is a wasteful number, since it uses less digits than its factorization.

9978823722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33870.

The product of its digits is 6096384, while the sum is 57.

The square root of 9978823722 is about 99894.0624962265. The cubic root of 9978823722 is about 2152.9128516991.

The spelling of 9978823722 in words is "nine billion, nine hundred seventy-eight million, eight hundred twenty-three thousand, seven hundred twenty-two".