320340224 has 18 divisors (see below), whose sum is σ = 639429630. Its totient is φ = 160169984.

The previous prime is 320340221. The next prime is 320340227. The reversal of 320340224 is 422043023.

It is an interprime number because it is at equal distance from previous prime (320340221) and next prime (320340227).

It can be written as a sum of positive squares in only one way, i.e., 268960000 + 51380224 = 16400^2 + 7168^2 .

It is a super-2 number, since 2×320340224² = 205235718224740352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320340196 and 320340205.

It is not an unprimeable number, because it can be changed into a prime (320340221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625409 + ... + 625920.

Almost surely, 2^320340224 is an apocalyptic number.

It is an amenable number.

320340224 is a deficient number, since it is larger than the sum of its proper divisors (319089406).

320340224 is an equidigital number, since it uses as much as digits as its factorization.

320340224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251345 (or 1251331 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 320340224 is about 17898.0508435975. The cubic root of 320340224 is about 684.2326990028.

Adding to 320340224 its reverse (422043023), we get a palindrome (742383247).

The spelling of 320340224 in words is "three hundred twenty million, three hundred forty thousand, two hundred twenty-four".