8117172 has 72 divisors (see below), whose sum is σ = 24338496. Its totient is φ = 2317248.

The previous prime is 8117167. The next prime is 8117173. The reversal of 8117172 is 2717118.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8117173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6208 + ... + 7400.

Almost surely, 2^8117172 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 8117172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12169248).

8117172 is an abundant number, since it is smaller than the sum of its proper divisors (16221324).

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

8117172 is a wasteful number, since it uses less digits than its factorization.

8117172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219 (or 1205 counting only the distinct ones).

The product of its digits is 784, while the sum is 27.

The square root of 8117172 is about 2849.0651098211. The cubic root of 8117172 is about 200.9717046380.

The spelling of 8117172 in words is "eight million, one hundred seventeen thousand, one hundred seventy-two".