280684 has 12 divisors (see below), whose sum is σ = 501984. Its totient is φ = 137264.

The previous prime is 280681. The next prime is 280697. The reversal of 280684 is 486082.

It is not an unprimeable number, because it can be changed into a prime (280681) 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 3 ways as a sum of consecutive naturals, for example, 559 + ... + 934.

It is an arithmetic number, because the mean of its divisors is an integer number (41832).

2²⁸⁰⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

280684 is a deficient number, since it is larger than the sum of its proper divisors (221300).

280684 is a wasteful number, since it uses less digits than its factorization.

280684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544 (or 1542 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 280684 is about 529.7961872267. The cubic root of 280684 is about 65.4745545355.

The spelling of 280684 in words is "two hundred eighty thousand, six hundred eighty-four".