8640830 has 16 divisors (see below), whose sum is σ = 16967664. Its totient is φ = 3142080.

The previous prime is 8640823. The next prime is 8640859. The reversal of 8640830 is 380468.

It is a junction number, because it is equal to n+sod(n) for n = 8640793 and 8640802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39167 + ... + 39386.

It is an arithmetic number, because the mean of its divisors is an integer number (1060479).

Almost surely, 2^8640830 is an apocalyptic number.

8640830 is a deficient number, since it is larger than the sum of its proper divisors (8326834).

8640830 is a wasteful number, since it uses less digits than its factorization.

8640830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78571.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 8640830 is about 2939.5288738163. The cubic root of 8640830 is about 205.2036841317.

The spelling of 8640830 in words is "eight million, six hundred forty thousand, eight hundred thirty".