280328000 has 112 divisors (see below), whose sum is σ = 705941184. Its totient is φ = 110246400.

The previous prime is 280327991. The next prime is 280328131. The reversal of 280328000 is 823082.

It is a congruent number.

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, 535739 + ... + 536261.

Almost surely, 2^280328000 is an apocalyptic number.

280328000 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 280328000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352970592).

280328000 is an abundant number, since it is smaller than the sum of its proper divisors (425613184).

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

280328000 is an equidigital number, since it uses as much as digits as its factorization.

280328000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 280328000 is about 16742.9985367018. The cubic root of 280328000 is about 654.4686170559.

It can be divided in two parts, 2803 and 28000, that added together give a palindrome (30803).

The spelling of 280328000 in words is "two hundred eighty million, three hundred twenty-eight thousand".