8217642372 has 24 divisors (see below), whose sum is σ = 19353702816. Its totient is φ = 2713613568.

The previous prime is 8217642371. The next prime is 8217642397. The reversal of 8217642372 is 2732467128.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (8217642371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3198733 + ... + 3201300.

It is an arithmetic number, because the mean of its divisors is an integer number (806404284).

Almost surely, 2^8217642372 is an apocalyptic number.

It is an amenable number.

8217642372 is an abundant number, since it is smaller than the sum of its proper divisors (11136060444).

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

8217642372 is a wasteful number, since it uses less digits than its factorization.

8217642372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6400147 (or 6400145 counting only the distinct ones).

The product of its digits is 225792, while the sum is 42.

The square root of 8217642372 is about 90651.2127442319. The cubic root of 8217642372 is about 2017.9748330573.

The spelling of 8217642372 in words is "eight billion, two hundred seventeen million, six hundred forty-two thousand, three hundred seventy-two".