204280320 has 160 divisors (see below), whose sum is σ = 664475328. Its totient is φ = 53526528.

The previous prime is 204280247. The next prime is 204280331. The reversal of 204280320 is 23082402.

It is a tau number, because it is divible by the number of its divisors (160).

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, 514362 + ... + 514758.

Almost surely, 2^204280320 is an apocalyptic number.

204280320 is a gapful number since it is divisible by the number (20) 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 204280320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332237664).

204280320 is an abundant number, since it is smaller than the sum of its proper divisors (460195008).

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

204280320 is an equidigital number, since it uses as much as digits as its factorization.

204280320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 204280320 is about 14292.6666511187. Note that the first 4 decimals coincide. The cubic root of 204280320 is about 588.9460452151.

The spelling of 204280320 in words is "two hundred four million, two hundred eighty thousand, three hundred twenty".