280846 has 4 divisors (see below), whose sum is σ = 421272. Its totient is φ = 140422.

The previous prime is 280843. The next prime is 280859. The reversal of 280846 is 648082.

280846 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.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280843) 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 as a sum of consecutive naturals, namely, 70210 + ... + 70213.

It is an arithmetic number, because the mean of its divisors is an integer number (105318).

2²⁸⁰⁸⁴⁶ is an apocalyptic number.

280846 is a deficient number, since it is larger than the sum of its proper divisors (140426).

280846 is a wasteful number, since it uses less digits than its factorization.

280846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140425.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 280846 is about 529.9490541552. The cubic root of 280846 is about 65.4871485771.

Subtracting 280846 from its reverse (648082), we obtain a square (367236 = 606²).

The spelling of 280846 in words is "two hundred eighty thousand, eight hundred forty-six".