280023 has 8 divisors (see below), whose sum is σ = 385536. Its totient is φ = 180600.

The previous prime is 280013. The next prime is 280031. The reversal of 280023 is 320082.

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

It is not a de Polignac number, because 280023 - 2⁵ = 279991 is a prime.

280023 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 279984 and 280011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280013) 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, 1413 + ... + 1598.

It is an arithmetic number, because the mean of its divisors is an integer number (48192).

2²⁸⁰⁰²³ is an apocalyptic number.

280023 is a deficient number, since it is larger than the sum of its proper divisors (105513).

280023 is a wasteful number, since it uses less digits than its factorization.

280023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 280023 is about 529.1719947238. The cubic root of 280023 is about 65.4231174529.

The spelling of 280023 in words is "two hundred eighty thousand, twenty-three".