321680830 has 32 divisors (see below), whose sum is σ = 610452000. Its totient is φ = 121709952.

The previous prime is 321680813. The next prime is 321680839. The reversal of 321680830 is 38086123.

321680830 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 321680792 and 321680801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321680839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206896 + ... + 208444.

It is an arithmetic number, because the mean of its divisors is an integer number (19076625).

Almost surely, 2^321680830 is an apocalyptic number.

321680830 is a deficient number, since it is larger than the sum of its proper divisors (288771170).

321680830 is a wasteful number, since it uses less digits than its factorization.

321680830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2668.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 321680830 is about 17935.4629156875. The cubic root of 321680830 is about 685.1858625065.

The spelling of 321680830 in words is "three hundred twenty-one million, six hundred eighty thousand, eight hundred thirty".