282440 has 32 divisors (see below), whose sum is σ = 665280. Its totient is φ = 107712.

The previous prime is 282439. The next prime is 282461. The reversal of 282440 is 44282.

282440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 282440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 767 + ... + 1073.

It is an arithmetic number, because the mean of its divisors is an integer number (20790).

2²⁸²⁴⁴⁰ is an apocalyptic number.

282440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 282440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332640).

282440 is an abundant number, since it is smaller than the sum of its proper divisors (382840).

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

282440 is a wasteful number, since it uses less digits than its factorization.

282440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 282440 is about 531.4508443873. The cubic root of 282440 is about 65.6108102351.

The spelling of 282440 in words is "two hundred eighty-two thousand, four hundred forty".