8640873 has 12 divisors (see below), whose sum is σ = 12786228. Its totient is φ = 5619840.

The previous prime is 8640871. The next prime is 8640883. The reversal of 8640873 is 3780468.

8640873 is a `hidden beast` number, since 8 + 640 + 8 + 7 + 3 = 666.

8640873 is digitally balanced in base 2, 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 1734489 + 6906384 = 1317^2 + 2628^2 .

It is not a de Polignac number, because 8640873 - 2¹ = 8640871 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 11340 + ... + 12077.

It is an arithmetic number, because the mean of its divisors is an integer number (1065519).

Almost surely, 2^8640873 is an apocalyptic number.

It is an amenable number.

8640873 is a deficient number, since it is larger than the sum of its proper divisors (4145355).

8640873 is a wasteful number, since it uses less digits than its factorization.

8640873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23464 (or 23461 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 8640873 is about 2939.5361879045. The cubic root of 8640873 is about 205.2040245212.

The spelling of 8640873 in words is "eight million, six hundred forty thousand, eight hundred seventy-three".