9879881472 has 288 divisors, whose sum is σ = 31552819200. Its totient is φ = 3040063488.

The previous prime is 9879881447. The next prime is 9879881503. The reversal of 9879881472 is 2741889789.

9879881472 is a `hidden beast` number, since 9 + 87 + 9 + 8 + 81 + 472 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×9879881472² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4609233 + ... + 4611375.

It is an arithmetic number, because the mean of its divisors is an integer number (109558400).

Almost surely, 2^9879881472 is an apocalyptic number.

9879881472 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9879881472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15776409600).

9879881472 is an abundant number, since it is smaller than the sum of its proper divisors (21672937728).

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

9879881472 is a wasteful number, since it uses less digits than its factorization.

9879881472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220 (or 2200 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 63.

The square root of 9879881472 is about 99397.5928883592. The cubic root of 9879881472 is about 2145.7736678089.

The spelling of 9879881472 in words is "nine billion, eight hundred seventy-nine million, eight hundred eighty-one thousand, four hundred seventy-two".