8687172 has 48 divisors (see below), whose sum is σ = 22014720. Its totient is φ = 2650368.

The previous prime is 8687171. The next prime is 8687183. The reversal of 8687172 is 2717868.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 8687172.

It is not an unprimeable number, because it can be changed into a prime (8687171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36229 + ... + 36467.

It is an arithmetic number, because the mean of its divisors is an integer number (458640).

Almost surely, 2^8687172 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 8687172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11007360).

8687172 is an abundant number, since it is smaller than the sum of its proper divisors (13327548).

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

8687172 is a wasteful number, since it uses less digits than its factorization.

8687172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 490 counting only the distinct ones).

The product of its digits is 37632, while the sum is 39.

The square root of 8687172 is about 2947.4008889189. The cubic root of 8687172 is about 205.5698757764.

The spelling of 8687172 in words is "eight million, six hundred eighty-seven thousand, one hundred seventy-two".