320644130 has 8 divisors (see below), whose sum is σ = 577159452. Its totient is φ = 128257648.

The previous prime is 320644087. The next prime is 320644151. The reversal of 320644130 is 31446023.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 292649449 + 27994681 = 17107^2 + 5291^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 320644096 and 320644105.

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 3 ways as a sum of consecutive naturals, for example, 16032197 + ... + 16032216.

Almost surely, 2^320644130 is an apocalyptic number.

320644130 is a deficient number, since it is larger than the sum of its proper divisors (256515322).

320644130 is a wasteful number, since it uses less digits than its factorization.

320644130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32064420.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 320644130 is about 17906.5387498534. The cubic root of 320644130 is about 684.4490072521.

The spelling of 320644130 in words is "three hundred twenty million, six hundred forty-four thousand, one hundred thirty".