8640478 has 32 divisors (see below), whose sum is σ = 17015040. Its totient is φ = 3188160.

The previous prime is 8640451. The next prime is 8640481. The reversal of 8640478 is 8740468.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1450 + ... + 4402.

It is an arithmetic number, because the mean of its divisors is an integer number (531720).

Almost surely, 2^8640478 is an apocalyptic number.

8640478 is a deficient number, since it is larger than the sum of its proper divisors (8374562).

8640478 is a wasteful number, since it uses less digits than its factorization.

8640478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 8640478 is about 2939.4689996664. The cubic root of 8640478 is about 205.2008976449.

The spelling of 8640478 in words is "eight million, six hundred forty thousand, four hundred seventy-eight".