280422 has 24 divisors (see below), whose sum is σ = 631176. Its totient is φ = 93312.

The previous prime is 280411. The next prime is 280451. The reversal of 280422 is 224082.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 280395 and 280404.

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 280422.

It is an unprimeable number.

280422 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 11 ways as a sum of consecutive naturals, for example, 198 + ... + 774.

It is an arithmetic number, because the mean of its divisors is an integer number (26299).

2²⁸⁰⁴²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315588).

280422 is an abundant number, since it is smaller than the sum of its proper divisors (350754).

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

280422 is an equidigital number, since it uses as much as digits as its factorization.

280422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 280422 is about 529.5488646008. The cubic root of 280422 is about 65.4541761343.

The spelling of 280422 in words is "two hundred eighty thousand, four hundred twenty-two".