320022730 has 8 divisors (see below), whose sum is σ = 576040932. Its totient is φ = 128009088.

The previous prime is 320022721. The next prime is 320022733. The reversal of 320022730 is 37220023.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 307055529 + 12967201 = 17523^2 + 3601^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 320022698 and 320022707.

It is not an unprimeable number, because it can be changed into a prime (320022733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16001127 + ... + 16001146.

Almost surely, 2^320022730 is an apocalyptic number.

320022730 is a deficient number, since it is larger than the sum of its proper divisors (256018202).

320022730 is a wasteful number, since it uses less digits than its factorization.

320022730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32002280.

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 320022730 is about 17889.1791315309. The cubic root of 320022730 is about 684.0065731844.

Adding to 320022730 its reverse (37220023), we get a palindrome (357242753).

The spelling of 320022730 in words is "three hundred twenty million, twenty-two thousand, seven hundred thirty".