280328 has 16 divisors (see below), whose sum is σ = 534480. Its totient is φ = 137808.

The previous prime is 280327. The next prime is 280337. The reversal of 280328 is 823082.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280328.

It is not an unprimeable number, because it can be changed into a prime (280321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275 + ... + 797.

It is an arithmetic number, because the mean of its divisors is an integer number (33405).

2²⁸⁰³²⁸ is an apocalyptic number.

It is an amenable number.

280328 is a deficient number, since it is larger than the sum of its proper divisors (254152).

280328 is a wasteful number, since it uses less digits than its factorization.

280328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 592 counting only the distinct ones).

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

The square root of 280328 is about 529.4601023684. The cubic root of 280328 is about 65.4468617056.

The spelling of 280328 in words is "two hundred eighty thousand, three hundred twenty-eight".