280055 has 8 divisors (see below), whose sum is σ = 340800. Its totient is φ = 220896.

The previous prime is 280037. The next prime is 280061. The reversal of 280055 is 550082.

280055 = 16² + 17² + ... + 94².

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

It is a cyclic number.

It is not a de Polignac number, because 280055 - 2⁶ = 279991 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280055.

It is an unprimeable number.

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, 41 + ... + 749.

It is an arithmetic number, because the mean of its divisors is an integer number (42600).

2²⁸⁰⁰⁵⁵ is an apocalyptic number.

280055 is a deficient number, since it is larger than the sum of its proper divisors (60745).

280055 is an equidigital number, since it uses as much as digits as its factorization.

280055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 280055 is about 529.2022297761. The cubic root of 280055 is about 65.4256094625.

The spelling of 280055 in words is "two hundred eighty thousand, fifty-five".