320873280 has 224 divisors, whose sum is σ = 1254215424. Its totient is φ = 67682304.

The previous prime is 320873243. The next prime is 320873291. The reversal of 320873280 is 82378023.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85524 + ... + 89196.

It is an arithmetic number, because the mean of its divisors is an integer number (5599176).

Almost surely, 2^320873280 is an apocalyptic number.

320873280 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 320873280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (627107712).

320873280 is an abundant number, since it is smaller than the sum of its proper divisors (933342144).

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

320873280 is a wasteful number, since it uses less digits than its factorization.

320873280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713 (or 3703 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 320873280 is about 17912.9361077407. The cubic root of 320873280 is about 684.6120167775.

The spelling of 320873280 in words is "three hundred twenty million, eight hundred seventy-three thousand, two hundred eighty".