9922979988 has 36 divisors (see below), whose sum is σ = 25122277908. Its totient is φ = 3302492160.

The previous prime is 9922979971. The next prime is 9922980037. The reversal of 9922979988 is 8899792299.

It can be written as a sum of positive squares in 2 ways, for example, as 5010091524 + 4912888464 = 70782^2 + 70092^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191931 + ... + 238082.

It is an arithmetic number, because the mean of its divisors is an integer number (697841053).

Almost surely, 2^9922979988 is an apocalyptic number.

It is an amenable number.

9922979988 is an abundant number, since it is smaller than the sum of its proper divisors (15199297920).

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

9922979988 is a wasteful number, since it uses less digits than its factorization.

9922979988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430664 (or 430659 counting only the distinct ones).

The product of its digits is 105815808, while the sum is 72.

The square root of 9922979988 is about 99614.1555603419. The cubic root of 9922979988 is about 2148.8892757852.

The spelling of 9922979988 in words is "nine billion, nine hundred twenty-two million, nine hundred seventy-nine thousand, nine hundred eighty-eight".