9855872 has 32 divisors (see below), whose sum is σ = 21148680. Its totient is φ = 4548096.

The previous prime is 9855871. The next prime is 9855887. The reversal of 9855872 is 2785589.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9855871) 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, 1298 + ... + 4625.

Almost surely, 2^9855872 is an apocalyptic number.

It is an amenable number.

9855872 is an abundant number, since it is smaller than the sum of its proper divisors (11292808).

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

9855872 is a wasteful number, since it uses less digits than its factorization.

9855872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5950 (or 5938 counting only the distinct ones).

The product of its digits is 201600, while the sum is 44.

The square root of 9855872 is about 3139.4063133019. The cubic root of 9855872 is about 214.4034082773.

It can be divided in two parts, 985587 and 2, that added together give a palindrome (985589).

The spelling of 9855872 in words is "nine million, eight hundred fifty-five thousand, eight hundred seventy-two".