8640460 has 12 divisors (see below), whose sum is σ = 18145008. Its totient is φ = 3456176.

The previous prime is 8640451. The next prime is 8640481. The reversal of 8640460 is 640468.

It is an Ulam 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 3 ways as a sum of consecutive naturals, for example, 215992 + ... + 216031.

It is an arithmetic number, because the mean of its divisors is an integer number (1512084).

Almost surely, 2^8640460 is an apocalyptic number.

It is an amenable number.

8640460 is an abundant number, since it is smaller than the sum of its proper divisors (9504548).

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

8640460 is a wasteful number, since it uses less digits than its factorization.

8640460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432032 (or 432030 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 8640460 is about 2939.4659378874. The cubic root of 8640460 is about 205.2007551520.

The spelling of 8640460 in words is "eight million, six hundred forty thousand, four hundred sixty".