280263 has 8 divisors (see below), whose sum is σ = 377728. Its totient is φ = 184824.

The previous prime is 280253. The next prime is 280277. The reversal of 280263 is 362082.

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

It is not a de Polignac number, because 280263 - 2⁶ = 280199 is a prime.

It is a d-powerful number, because it can be written as 2² + 8² + 2⁸ + 0 + 6⁷ + 3 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280223) 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, 145 + ... + 762.

It is an arithmetic number, because the mean of its divisors is an integer number (47216).

2²⁸⁰²⁶³ is an apocalyptic number.

280263 is a deficient number, since it is larger than the sum of its proper divisors (97465).

280263 is a wasteful number, since it uses less digits than its factorization.

280263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 280263 is about 529.3987155255. The cubic root of 280263 is about 65.4418028997.

The spelling of 280263 in words is "two hundred eighty thousand, two hundred sixty-three".