280330 has 24 divisors (see below), whose sum is σ = 541548. Its totient is φ = 104448.

The previous prime is 280327. The next prime is 280337. The reversal of 280330 is 33082.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 194481 + 85849 = 441^2 + 293^2 .

It is not an unprimeable number, because it can be changed into a prime (280337) 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, 2842 + ... + 2938.

2²⁸⁰³³⁰ is an apocalyptic number.

280330 is a deficient number, since it is larger than the sum of its proper divisors (261218).

280330 is a wasteful number, since it uses less digits than its factorization.

280330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 280330 is about 529.4619910815. The cubic root of 280330 is about 65.4470173488.

The spelling of 280330 in words is "two hundred eighty thousand, three hundred thirty".