280383 has 8 divisors (see below), whose sum is σ = 393600. Its totient is φ = 177048.

The previous prime is 280373. The next prime is 280409. The reversal of 280383 is 383082.

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

It is not a de Polignac number, because 280383 - 2⁵ = 280351 is a prime.

It is a super-2 number, since 2×280383² = 157229253378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2403 + ... + 2516.

It is an arithmetic number, because the mean of its divisors is an integer number (49200).

2²⁸⁰³⁸³ is an apocalyptic number.

280383 is a deficient number, since it is larger than the sum of its proper divisors (113217).

280383 is a wasteful number, since it uses less digits than its factorization.

280383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4941.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 280383 is about 529.5120395232. The cubic root of 280383 is about 65.4511416229.

The spelling of 280383 in words is "two hundred eighty thousand, three hundred eighty-three".