9988172 has 6 divisors (see below), whose sum is σ = 17479308. Its totient is φ = 4994084.

The previous prime is 9988171. The next prime is 9988177. The reversal of 9988172 is 2718899.

It is not an unprimeable number, because it can be changed into a prime (9988171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1248518 + ... + 1248525.

It is an arithmetic number, because the mean of its divisors is an integer number (2913218).

Almost surely, 2^9988172 is an apocalyptic number.

It is an amenable number.

9988172 is a deficient number, since it is larger than the sum of its proper divisors (7491136).

9988172 is a wasteful number, since it uses less digits than its factorization.

9988172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497047 (or 2497045 counting only the distinct ones).

The product of its digits is 72576, while the sum is 44.

The square root of 9988172 is about 3160.4069358233. The cubic root of 9988172 is about 215.3584933129.

The spelling of 9988172 in words is "nine million, nine hundred eighty-eight thousand, one hundred seventy-two".