320672320 has 28 divisors (see below), whose sum is σ = 763601724. Its totient is φ = 128268800.

The previous prime is 320672299. The next prime is 320672323. The reversal of 320672320 is 23276023.

It can be written as a sum of positive squares in 2 ways, for example, as 253956096 + 66716224 = 15936^2 + 8168^2 .

It is a super-3 number, since 3×320672320³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (320672323) 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, 500731 + ... + 501370.

Almost surely, 2^320672320 is an apocalyptic number.

It is an amenable number.

320672320 is an abundant number, since it is smaller than the sum of its proper divisors (442929404).

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

320672320 is a wasteful number, since it uses less digits than its factorization.

320672320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002118 (or 1002108 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 320672320 is about 17907.3258751830. The cubic root of 320672320 is about 684.4690648490.

The spelling of 320672320 in words is "three hundred twenty million, six hundred seventy-two thousand, three hundred twenty".