8189172 has 36 divisors (see below), whose sum is σ = 21919716. Its totient is φ = 2568960.

The previous prime is 8189161. The next prime is 8189191. The reversal of 8189172 is 2719818.

It can be written as a sum of positive squares in 2 ways, for example, as 3549456 + 4639716 = 1884^2 + 2154^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6079 + ... + 7302.

It is an arithmetic number, because the mean of its divisors is an integer number (608881).

Almost surely, 2^8189172 is an apocalyptic number.

It is an amenable number.

8189172 is an abundant number, since it is smaller than the sum of its proper divisors (13730544).

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

8189172 is a wasteful number, since it uses less digits than its factorization.

8189172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13408 (or 13403 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 8189172 is about 2861.6729372869. The cubic root of 8189172 is about 201.5641683294.

It can be divided in two parts, 81 and 89172, that added together give a triangular number (89253 = T₄₂₂).

The spelling of 8189172 in words is "eight million, one hundred eighty-nine thousand, one hundred seventy-two".