320473280 has 56 divisors (see below), whose sum is σ = 783781008. Its totient is φ = 124720128.

The previous prime is 320473271. The next prime is 320473289. The reversal of 320473280 is 82374023.

It is an interprime number because it is at equal distance from previous prime (320473271) and next prime (320473289).

It is not an unprimeable number, because it can be changed into a prime (320473289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1694 + ... + 25373.

Almost surely, 2^320473280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320473280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391890504).

320473280 is an abundant number, since it is smaller than the sum of its proper divisors (463307728).

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

320473280 is a wasteful number, since it uses less digits than its factorization.

320473280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27121 (or 27111 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 320473280 is about 17901.7675105002. The cubic root of 320473280 is about 684.3274198206.

The spelling of 320473280 in words is "three hundred twenty million, four hundred seventy-three thousand, two hundred eighty".