9871872 has 40 divisors (see below), whose sum is σ = 26303376. Its totient is φ = 3290112.

The previous prime is 9871843. The next prime is 9871877. The reversal of 9871872 is 2781789.

9871872 is nontrivially palindromic in base 15.

It is not an unprimeable number, because it can be changed into a prime (9871877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1678 + ... + 4749.

Almost surely, 2^9871872 is an apocalyptic number.

It is an amenable number.

9871872 is an abundant number, since it is smaller than the sum of its proper divisors (16431504).

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

9871872 is an equidigital number, since it uses as much as digits as its factorization.

9871872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6448 (or 6432 counting only the distinct ones).

The product of its digits is 56448, while the sum is 42.

The square root of 9871872 is about 3141.9535324381. The cubic root of 9871872 is about 214.5193662184.

It can be divided in two parts, 98718 and 72, that added together give a triangular number (98790 = T₄₄₄).

The spelling of 9871872 in words is "nine million, eight hundred seventy-one thousand, eight hundred seventy-two".