280568 has 16 divisors (see below), whose sum is σ = 557280. Its totient is φ = 131968.

The previous prime is 280561. The next prime is 280583. The reversal of 280568 is 865082.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 280568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280561) by changing a digit.

280568 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, 896 + ... + 1167.

It is an arithmetic number, because the mean of its divisors is an integer number (34830).

2²⁸⁰⁵⁶⁸ is an apocalyptic number.

It is an amenable number.

280568 is a deficient number, since it is larger than the sum of its proper divisors (276712).

280568 is a wasteful number, since it uses less digits than its factorization.

280568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086 (or 2082 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 280568 is about 529.6866998519. The cubic root of 280568 is about 65.4655336023.

It can be divided in two parts, 280 and 568, that added together give a palindrome (848).

The spelling of 280568 in words is "two hundred eighty thousand, five hundred sixty-eight".