280853 has 4 divisors (see below), whose sum is σ = 293088. Its totient is φ = 268620.

The previous prime is 280843. The next prime is 280859. The reversal of 280853 is 358082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 358082 = 2 ⋅179041.

It is a cyclic number.

It is not a de Polignac number, because 280853 - 2⁴ = 280837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6083 + ... + 6128.

It is an arithmetic number, because the mean of its divisors is an integer number (73272).

2²⁸⁰⁸⁵³ is an apocalyptic number.

280853 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

280853 is a deficient number, since it is larger than the sum of its proper divisors (12235).

280853 is a wasteful number, since it uses less digits than its factorization.

280853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12234.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 280853 is about 529.9556585225. The cubic root of 280853 is about 65.4876926549.

It can be divided in two parts, 28085 and 3, that multiplied together give a triangular number (84255 = T₄₁₀).

The spelling of 280853 in words is "two hundred eighty thousand, eight hundred fifty-three".