283240 has 32 divisors (see below), whose sum is σ = 652680. Its totient is φ = 110592.

The previous prime is 283211. The next prime is 283267. The reversal of 283240 is 42382.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 228484 + 54756 = 478^2 + 234^2 .

It is an unprimeable number.

283240 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 in 7 ways as a sum of consecutive naturals, for example, 2872 + ... + 2968.

2²⁸³²⁴⁰ is an apocalyptic number.

283240 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 283240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326340).

283240 is an abundant number, since it is smaller than the sum of its proper divisors (369440).

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

283240 is a wasteful number, since it uses less digits than its factorization.

283240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 283240 is about 532.2029688004. The cubic root of 283240 is about 65.6726985049.

The spelling of 283240 in words is "two hundred eighty-three thousand, two hundred forty".