280329 has 12 divisors (see below), whose sum is σ = 435024. Its totient is φ = 160104.

The previous prime is 280327. The next prime is 280337. The reversal of 280329 is 923082.

It is not a de Polignac number, because 280329 - 2¹ = 280327 is a prime.

280329 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 280299 and 280308.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280329.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 807 + ... + 1100.

It is an arithmetic number, because the mean of its divisors is an integer number (36252).

2²⁸⁰³²⁹ is an apocalyptic number.

It is an amenable number.

280329 is a deficient number, since it is larger than the sum of its proper divisors (154695).

280329 is a wasteful number, since it uses less digits than its factorization.

280329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924 (or 1917 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 280329 is about 529.4610467258. The cubic root of 280329 is about 65.4469395273.

The spelling of 280329 in words is "two hundred eighty thousand, three hundred twenty-nine".