320289906 has 16 divisors (see below), whose sum is σ = 640762848. Its totient is φ = 106732800.

The previous prime is 320289901. The next prime is 320289917. The reversal of 320289906 is 609982023.

It is not an unprimeable number, because it can be changed into a prime (320289901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27741 + ... + 37551.

It is an arithmetic number, because the mean of its divisors is an integer number (40047678).

Almost surely, 2^320289906 is an apocalyptic number.

320289906 is an abundant number, since it is smaller than the sum of its proper divisors (320472942).

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

320289906 is a wasteful number, since it uses less digits than its factorization.

320289906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15257.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 320289906 is about 17896.6451045999. The cubic root of 320289906 is about 684.1968714449.

The spelling of 320289906 in words is "three hundred twenty million, two hundred eighty-nine thousand, nine hundred six".