8491273272 has 96 divisors (see below), whose sum is σ = 23182068000. Its totient is φ = 2807758080.

The previous prime is 8491273249. The next prime is 8491273279. The reversal of 8491273272 is 2723721948.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8491273279) 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 23 ways as a sum of consecutive naturals, for example, 9239229 + ... + 9240147.

It is an arithmetic number, because the mean of its divisors is an integer number (241479875).

Almost surely, 2^8491273272 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 8491273272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11591034000).

8491273272 is an abundant number, since it is smaller than the sum of its proper divisors (14690794728).

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

8491273272 is a wasteful number, since it uses less digits than its factorization.

8491273272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821 (or 1814 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 8491273272 is about 92148.1050917489. The cubic root of 8491273272 is about 2040.1288903569.

The spelling of 8491273272 in words is "eight billion, four hundred ninety-one million, two hundred seventy-three thousand, two hundred seventy-two".