280834 has 4 divisors (see below), whose sum is σ = 421254. Its totient is φ = 140416.

The previous prime is 280817. The next prime is 280837. The reversal of 280834 is 438082.

280834 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 438082 = 2 ⋅219041.

It can be written as a sum of positive squares in only one way, i.e., 205209 + 75625 = 453^2 + 275^2 .

It is a junction number, because it is equal to n+sod(n) for n = 280799 and 280808.

It is not an unprimeable number, because it can be changed into a prime (280837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70207 + ... + 70210.

2²⁸⁰⁸³⁴ is an apocalyptic number.

280834 is a deficient number, since it is larger than the sum of its proper divisors (140420).

280834 is a wasteful number, since it uses less digits than its factorization.

280834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140419.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 280834 is about 529.9377321912. The cubic root of 280834 is about 65.4862158512.

The spelling of 280834 in words is "two hundred eighty thousand, eight hundred thirty-four".