280842 has 8 divisors (see below), whose sum is σ = 561696. Its totient is φ = 93612.

The previous prime is 280837. The next prime is 280843. The reversal of 280842 is 248082.

280842 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

280842 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280842.

It is not an unprimeable number, because it can be changed into a prime (280843) by changing a digit.

280842 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23398 + ... + 23409.

It is an arithmetic number, because the mean of its divisors is an integer number (70212).

2²⁸⁰⁸⁴² is an apocalyptic number.

280842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

280842 is a wasteful number, since it uses less digits than its factorization.

280842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46812.

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 280842 is about 529.9452801941. The cubic root of 280842 is about 65.4868376714.

It can be divided in two parts, 2808 and 42, that added together give a triangular number (2850 = T₇₅).

The spelling of 280842 in words is "two hundred eighty thousand, eight hundred forty-two".