320622720 has 512 divisors, whose sum is σ = 1269043200. Its totient is φ = 67829760.

The previous prime is 320622719. The next prime is 320622721. The reversal of 320622720 is 27226023.

It is an interprime number because it is at equal distance from previous prime (320622719) and next prime (320622721).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320622721) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6821737 + ... + 6821783.

It is an arithmetic number, because the mean of its divisors is an integer number (2478600).

Almost surely, 2^320622720 is an apocalyptic number.

320622720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320622720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (634521600).

320622720 is an abundant number, since it is smaller than the sum of its proper divisors (948420480).

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

320622720 is a wasteful number, since it uses less digits than its factorization.

320622720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 320622720 is about 17905.9409135627. The cubic root of 320622720 is about 684.4337729388.

Adding to 320622720 its reverse (27226023), we get a palindrome (347848743).

The spelling of 320622720 in words is "three hundred twenty million, six hundred twenty-two thousand, seven hundred twenty".