989172 has 60 divisors (see below), whose sum is σ = 2683296. Its totient is φ = 317520.

The previous prime is 989171. The next prime is 989173. The reversal of 989172 is 271989.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (989171) and next prime (989173).

It is a super-2 number, since 2×989172² = 1956922491168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989172.

It is not an unprimeable number, because it can be changed into a prime (989171) 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 19 ways as a sum of consecutive naturals, for example, 13897 + ... + 13967.

2⁹⁸⁹¹⁷² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1341648).

989172 is an abundant number, since it is smaller than the sum of its proper divisors (1694124).

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

989172 is a wasteful number, since it uses less digits than its factorization.

989172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 119 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 989172 is about 994.5712644150. The cubic root of 989172 is about 99.6377560443.

Subtracting from 989172 its product of digits (9072), we obtain a square (980100 = 990²).

The spelling of 989172 in words is "nine hundred eighty-nine thousand, one hundred seventy-two".