320065680 has 160 divisors (see below), whose sum is σ = 1109179008. Its totient is φ = 75673600.

The previous prime is 320065673. The next prime is 320065717. The reversal of 320065680 is 86560023.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106762 + ... + 109718.

Almost surely, 2^320065680 is an apocalyptic number.

320065680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320065680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (554589504).

320065680 is an abundant number, since it is smaller than the sum of its proper divisors (789113328).

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

320065680 is a wasteful number, since it uses less digits than its factorization.

320065680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3025 (or 3019 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 320065680 is about 17890.3795376174. The cubic root of 320065680 is about 684.0371718111.

The spelling of 320065680 in words is "three hundred twenty million, sixty-five thousand, six hundred eighty".