9881568 has 48 divisors (see below), whose sum is σ = 28823760. Its totient is φ = 3293568.

The previous prime is 9881561. The next prime is 9881569. The reversal of 9881568 is 8651889.

9881568 is a `hidden beast` number, since 9 + 8 + 81 + 568 = 666.

9881568 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×9881568² = 195290772277248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9881561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4855 + ... + 6582.

It is an arithmetic number, because the mean of its divisors is an integer number (600495).

Almost surely, 2^9881568 is an apocalyptic number.

It is an amenable number.

9881568 is an abundant number, since it is smaller than the sum of its proper divisors (18942192).

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

9881568 is a wasteful number, since it uses less digits than its factorization.

9881568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11456 (or 11442 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 9881568 is about 3143.4961428321. The cubic root of 9881568 is about 214.5895757717.

It can be divided in two parts, 988 and 1568, that added together give a triangular number (2556 = T₇₁).

The spelling of 9881568 in words is "nine million, eight hundred eighty-one thousand, five hundred sixty-eight".