8640522 has 72 divisors (see below), whose sum is σ = 21838752. Its totient is φ = 2448000.

The previous prime is 8640503. The next prime is 8640547. The reversal of 8640522 is 2250468.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 57147 + ... + 57297.

It is an arithmetic number, because the mean of its divisors is an integer number (303316).

Almost surely, 2^8640522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8640522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10919376).

8640522 is an abundant number, since it is smaller than the sum of its proper divisors (13198230).

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

8640522 is a wasteful number, since it uses less digits than its factorization.

8640522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 184 counting only the distinct ones).

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

The square root of 8640522 is about 2939.4764840019. The cubic root of 8640522 is about 205.2012459599.

The spelling of 8640522 in words is "eight million, six hundred forty thousand, five hundred twenty-two".