9987891282 has 12 divisors (see below), whose sum is σ = 21640431150. Its totient is φ = 3329297088.

The previous prime is 9987891281. The next prime is 9987891283. The reversal of 9987891282 is 2821987899.

It is an interprime number because it is at equal distance from previous prime (9987891281) and next prime (9987891283).

It can be written as a sum of positive squares in only one way, i.e., 5867406801 + 4120484481 = 76599^2 + 64191^2 .

It is a super-3 number, since 3×9987891282³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (9987891281) 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 5 ways as a sum of consecutive naturals, for example, 277441407 + ... + 277441442.

Almost surely, 2^9987891282 is an apocalyptic number.

9987891282 is an abundant number, since it is smaller than the sum of its proper divisors (11652539868).

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

9987891282 is a wasteful number, since it uses less digits than its factorization.

9987891282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554882857 (or 554882854 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 63.

The square root of 9987891282 is about 99939.4380712639. The cubic root of 9987891282 is about 2153.5647574080.

The spelling of 9987891282 in words is "nine billion, nine hundred eighty-seven million, eight hundred ninety-one thousand, two hundred eighty-two".