8640424 has 32 divisors (see below), whose sum is σ = 17569440. Its totient is φ = 3960000.

The previous prime is 8640419. The next prime is 8640427. The reversal of 8640424 is 4240468.

8640424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 8640392 and 8640401.

It is not an unprimeable number, because it can be changed into a prime (8640427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25939 + ... + 26269.

It is an arithmetic number, because the mean of its divisors is an integer number (549045).

Almost surely, 2^8640424 is an apocalyptic number.

It is an amenable number.

8640424 is an abundant number, since it is smaller than the sum of its proper divisors (8929016).

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

8640424 is a wasteful number, since it uses less digits than its factorization.

8640424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 8640424 is about 2939.4598143196. The cubic root of 8640424 is about 205.2004701657.

The spelling of 8640424 in words is "eight million, six hundred forty thousand, four hundred twenty-four".