9927198972 has 30 divisors (see below), whose sum is σ = 25951659888. Its totient is φ = 3309066216.

The previous prime is 9927198959. The next prime is 9927198991. The reversal of 9927198972 is 2798917299.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15319428 + ... + 15320075.

Almost surely, 2^9927198972 is an apocalyptic number.

It is an amenable number.

9927198972 is an abundant number, since it is smaller than the sum of its proper divisors (16024460916).

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

9927198972 is a wasteful number, since it uses less digits than its factorization.

9927198972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30639519 (or 30639508 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 63.

The square root of 9927198972 is about 99635.3299387321. The cubic root of 9927198972 is about 2149.1937825932.

The spelling of 9927198972 in words is "nine billion, nine hundred twenty-seven million, one hundred ninety-eight thousand, nine hundred seventy-two".