9881872 has 80 divisors (see below), whose sum is σ = 25748352. Its totient is φ = 3548160.

The previous prime is 9881869. The next prime is 9881887. The reversal of 9881872 is 2781889.

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, 15708 + ... + 16324.

Almost surely, 2^9881872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9881872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12874176).

9881872 is an abundant number, since it is smaller than the sum of its proper divisors (15866480).

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

9881872 is a wasteful number, since it uses less digits than its factorization.

9881872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 650 counting only the distinct ones).

The product of its digits is 64512, while the sum is 43.

The square root of 9881872 is about 3143.5444962653. The cubic root of 9881872 is about 214.5917763187.

The spelling of 9881872 in words is "nine million, eight hundred eighty-one thousand, eight hundred seventy-two".