280923 has 8 divisors (see below), whose sum is σ = 387600. Its totient is φ = 180768.

The previous prime is 280921. The next prime is 280927. The reversal of 280923 is 329082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 280923 - 2¹ = 280921 is a prime.

280923 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 280893 and 280902.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280923.

It is not an unprimeable number, because it can be changed into a prime (280921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1528 + ... + 1701.

It is an arithmetic number, because the mean of its divisors is an integer number (48450).

2²⁸⁰⁹²³ is an apocalyptic number.

280923 is a deficient number, since it is larger than the sum of its proper divisors (106677).

280923 is a wasteful number, since it uses less digits than its factorization.

280923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3261.

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

The square root of 280923 is about 530.0216976691. The cubic root of 280923 is about 65.4931329358.

The spelling of 280923 in words is "two hundred eighty thousand, nine hundred twenty-three".