9889872 has 20 divisors (see below), whose sum is σ = 25548960. Its totient is φ = 3296608.

The previous prime is 9889849. The next prime is 9889877. The reversal of 9889872 is 2789889.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9889877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102972 + ... + 103067.

It is an arithmetic number, because the mean of its divisors is an integer number (1277448).

Almost surely, 2^9889872 is an apocalyptic number.

It is an amenable number.

9889872 is an abundant number, since it is smaller than the sum of its proper divisors (15659088).

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

9889872 is a wasteful number, since it uses less digits than its factorization.

9889872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206050 (or 206044 counting only the distinct ones).

The product of its digits is 580608, while the sum is 51.

The square root of 9889872 is about 3144.8166878214. The cubic root of 9889872 is about 214.6496692344.

The spelling of 9889872 in words is "nine million, eight hundred eighty-nine thousand, eight hundred seventy-two".