8640870 has 64 divisors (see below), whose sum is σ = 24744960. Its totient is φ = 1888128.

The previous prime is 8640859. The next prime is 8640871. The reversal of 8640870 is 780468.

8640870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3936 + ... + 5724.

It is an arithmetic number, because the mean of its divisors is an integer number (386640).

Almost surely, 2^8640870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8640870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12372480).

8640870 is an abundant number, since it is smaller than the sum of its proper divisors (16104090).

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

8640870 is a wasteful number, since it uses less digits than its factorization.

8640870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 8640870 is about 2939.5356776199. The cubic root of 8640870 is about 205.2040007732.

The spelling of 8640870 in words is "eight million, six hundred forty thousand, eight hundred seventy".