9972398992 has 20 divisors (see below), whose sum is σ = 19609906096. Its totient is φ = 4911778080.

The previous prime is 9972398981. The next prime is 9972398999. The reversal of 9972398992 is 2998932799.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is not an unprimeable number, because it can be changed into a prime (9972398999) 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, 4650234 + ... + 4652377.

Almost surely, 2^9972398992 is an apocalyptic number.

It is an amenable number.

9972398992 is a deficient number, since it is larger than the sum of its proper divisors (9637507104).

9972398992 is a wasteful number, since it uses less digits than its factorization.

9972398992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9302686 (or 9302680 counting only the distinct ones).

The product of its digits is 39680928, while the sum is 67.

The square root of 9972398992 is about 99861.8996013995. The cubic root of 9972398992 is about 2152.4507112798.

The spelling of 9972398992 in words is "nine billion, nine hundred seventy-two million, three hundred ninety-eight thousand, nine hundred ninety-two".