8640500 has 48 divisors (see below), whose sum is σ = 20599488. Its totient is φ = 3140000.

The previous prime is 8640493. The next prime is 8640503. The reversal of 8640500 is 50468.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4715 + ... + 6285.

It is an arithmetic number, because the mean of its divisors is an integer number (429156).

Almost surely, 2^8640500 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 8640500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10299744).

8640500 is an abundant number, since it is smaller than the sum of its proper divisors (11958988).

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

8640500 is a wasteful number, since it uses less digits than its factorization.

8640500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601 (or 1589 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 8640500 is about 2939.4727418365. The cubic root of 8640500 is about 205.2010718025.

Adding to 8640500 its reverse (50468), we get a palindrome (8690968).

The spelling of 8640500 in words is "eight million, six hundred forty thousand, five hundred".