320320272 has 80 divisors (see below), whose sum is σ = 868436480. Its totient is φ = 101606400.

The previous prime is 320320261. The next prime is 320320291. The reversal of 320320272 is 272023023.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89004 + ... + 92532.

It is an arithmetic number, because the mean of its divisors is an integer number (10855456).

Almost surely, 2^320320272 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 320320272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434218240).

320320272 is an abundant number, since it is smaller than the sum of its proper divisors (548116208).

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

320320272 is a wasteful number, since it uses less digits than its factorization.

320320272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3632 (or 3626 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 320320272 is about 17897.4934557887. The cubic root of 320320272 is about 684.2184931750.

Adding to 320320272 its reverse (272023023), we get a palindrome (592343295).

The spelling of 320320272 in words is "three hundred twenty million, three hundred twenty thousand, two hundred seventy-two".