8504640 has 84 divisors (see below), whose sum is σ = 29262324. Its totient is φ = 2267136.

The previous prime is 8504599. The next prime is 8504653. The reversal of 8504640 is 464058.

8504640 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5089536 + 3415104 = 2256^2 + 1848^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1404 + ... + 4356.

It is an arithmetic number, because the mean of its divisors is an integer number (348361).

Almost surely, 2^8504640 is an apocalyptic number.

8504640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8504640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14631162).

8504640 is an abundant number, since it is smaller than the sum of its proper divisors (20757684).

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

8504640 is a wasteful number, since it uses less digits than its factorization.

8504640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976 (or 2963 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 8504640 is about 2916.2715922904. The cubic root of 8504640 is about 204.1198833990.

Adding to 8504640 its reverse (464058), we get a palindrome (8968698).

The spelling of 8504640 in words is "eight million, five hundred four thousand, six hundred forty".