320878864 has 20 divisors (see below), whose sum is σ = 622634256. Its totient is φ = 160199072.

The previous prime is 320878807. The next prime is 320878889. The reversal of 320878864 is 468878023.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3754 + ... + 25609.

Almost surely, 2^320878864 is an apocalyptic number.

It is an amenable number.

320878864 is a deficient number, since it is larger than the sum of its proper divisors (301755392).

320878864 is a wasteful number, since it uses less digits than its factorization.

320878864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30054 (or 30048 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 46.

The square root of 320878864 is about 17913.0919720745. The cubic root of 320878864 is about 684.6159880766.

The spelling of 320878864 in words is "three hundred twenty million, eight hundred seventy-eight thousand, eight hundred sixty-four".