9871969770 has 384 divisors, whose sum is σ = 30028078080. Its totient is φ = 2317870080.

The previous prime is 9871969703. The next prime is 9871969781. The reversal of 9871969770 is 779691789.

9871969770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 9871969698 and 9871969707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 90568476 + ... + 90568584.

It is an arithmetic number, because the mean of its divisors is an integer number (78198120).

Almost surely, 2^9871969770 is an apocalyptic number.

9871969770 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9871969770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15014039040).

9871969770 is an abundant number, since it is smaller than the sum of its proper divisors (20156108310).

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

9871969770 is a wasteful number, since it uses less digits than its factorization.

9871969770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 12002256, while the sum is 63.

The square root of 9871969770 is about 99357.7866601305. The cubic root of 9871969770 is about 2145.2007440859.

The spelling of 9871969770 in words is "nine billion, eight hundred seventy-one million, nine hundred sixty-nine thousand, seven hundred seventy".