320206672 has 10 divisors (see below), whose sum is σ = 620400458. Its totient is φ = 160103328.

The previous prime is 320206669. The next prime is 320206673. The reversal of 320206672 is 276602023.

It can be written as a sum of positive squares in only one way, i.e., 304014096 + 16192576 = 17436^2 + 4024^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 320206672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320206673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006443 + ... + 10006474.

Almost surely, 2^320206672 is an apocalyptic number.

It is an amenable number.

320206672 is a deficient number, since it is larger than the sum of its proper divisors (300193786).

320206672 is a wasteful number, since it uses less digits than its factorization.

320206672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20012925 (or 20012919 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 320206672 is about 17894.3195455988. The cubic root of 320206672 is about 684.1375987099.

Adding to 320206672 its reverse (276602023), we get a palindrome (596808695).

The spelling of 320206672 in words is "three hundred twenty million, two hundred six thousand, six hundred seventy-two".