320280 has 64 divisors (see below), whose sum is σ = 1023840. Its totient is φ = 79872.

The previous prime is 320273. The next prime is 320291. The reversal of 320280 is 82023.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320280.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1962 + ... + 2118.

2³²⁰²⁸⁰ is an apocalyptic number.

320280 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 320280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (511920).

320280 is an abundant number, since it is smaller than the sum of its proper divisors (703560).

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

320280 is a wasteful number, since it uses less digits than its factorization.

320280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 320280 is about 565.9328582085. The cubic root of 320280 is about 68.4189817706.

The spelling of 320280 in words is "three hundred twenty thousand, two hundred eighty".