9987298776 has 576 divisors, whose sum is σ = 36387842400. Its totient is φ = 2445520896.

The previous prime is 9987298733. The next prime is 9987298807. The reversal of 9987298776 is 6778927899.

It is a super-2 number, since 2×9987298776² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (192036096) is a multiple of the sum of its prime factors (288).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 63613290 + ... + 63613446.

Almost surely, 2^9987298776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9987298776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18193921200).

9987298776 is an abundant number, since it is smaller than the sum of its proper divisors (26400543624).

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

9987298776 is a wasteful number, since it uses less digits than its factorization.

9987298776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 274 counting only the distinct ones).

The product of its digits is 192036096, while the sum is 72.

The square root of 9987298776 is about 99936.4737020473. The cubic root of 9987298776 is about 2153.5221716664.

The spelling of 9987298776 in words is "nine billion, nine hundred eighty-seven million, two hundred ninety-eight thousand, seven hundred seventy-six".