8172318 has 96 divisors (see below), whose sum is σ = 21945600. Its totient is φ = 2010960.

The previous prime is 8172293. The next prime is 8172319. The reversal of 8172318 is 8132718.

It is a happy number.

Its product of digits (2688) is a multiple of the sum of its prime divisors (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8172319) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 430113 + ... + 430131.

It is an arithmetic number, because the mean of its divisors is an integer number (228600).

Almost surely, 2^8172318 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8172318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10972800).

8172318 is an abundant number, since it is smaller than the sum of its proper divisors (13773282).

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

8172318 is a wasteful number, since it uses less digits than its factorization.

8172318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 42 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 8172318 is about 2858.7266396072. The cubic root of 8172318 is about 201.4257947263.

The spelling of 8172318 in words is "eight million, one hundred seventy-two thousand, three hundred eighteen".