8491072 has 28 divisors (see below), whose sum is σ = 16965676. Its totient is φ = 4216320.

The previous prime is 8491069. The next prime is 8491073. The reversal of 8491072 is 2701948.

It can be written as a sum of positive squares in 2 ways, for example, as 4064256 + 4426816 = 2016^2 + 2104^2 .

It is not an unprimeable number, because it can be changed into a prime (8491073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11218 + ... + 11950.

It is an arithmetic number, because the mean of its divisors is an integer number (605917).

Almost surely, 2^8491072 is an apocalyptic number.

It is an amenable number.

8491072 is a deficient number, since it is larger than the sum of its proper divisors (8474604).

8491072 is a wasteful number, since it uses less digits than its factorization.

8491072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 8491072 is about 2913.9444057840. The cubic root of 8491072 is about 204.0112770903.

The spelling of 8491072 in words is "eight million, four hundred ninety-one thousand, seventy-two".