9981238280 has 64 divisors (see below), whose sum is σ = 24198834240. Its totient is φ = 3683319552.

The previous prime is 9981238273. The next prime is 9981238297. The reversal of 9981238280 is 828321899.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1174607 + ... + 1183073.

It is an arithmetic number, because the mean of its divisors is an integer number (378106785).

Almost surely, 2^9981238280 is an apocalyptic number.

It is an amenable number.

9981238280 is an abundant number, since it is smaller than the sum of its proper divisors (14217595960).

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

9981238280 is a wasteful number, since it uses less digits than its factorization.

9981238280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10758 (or 10754 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 9981238280 is about 99906.1473584083. The cubic root of 9981238280 is about 2153.0864831769.

The spelling of 9981238280 in words is "nine billion, nine hundred eighty-one million, two hundred thirty-eight thousand, two hundred eighty".