9866172 has 24 divisors (see below), whose sum is σ = 24022656. Its totient is φ = 3145648.

The previous prime is 9866167. The next prime is 9866179. The reversal of 9866172 is 2716689.

It is a self number, because there is not a number n which added to its sum of digits gives 9866172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9866179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17598 + ... + 18149.

It is an arithmetic number, because the mean of its divisors is an integer number (1000944).

Almost surely, 2^9866172 is an apocalyptic number.

9866172 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

9866172 is an abundant number, since it is smaller than the sum of its proper divisors (14156484).

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

9866172 is a wasteful number, since it uses less digits than its factorization.

9866172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35777 (or 35775 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 9866172 is about 3141.0463224856. The cubic root of 9866172 is about 214.4780705789.

The spelling of 9866172 in words is "nine million, eight hundred sixty-six thousand, one hundred seventy-two".