280886 has 4 divisors (see below), whose sum is σ = 421332. Its totient is φ = 140442.

The previous prime is 280883. The next prime is 280897. The reversal of 280886 is 688082.

It is a semiprime because it is the product of two primes.

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 280886.

It is not an unprimeable number, because it can be changed into a prime (280883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70220 + ... + 70223.

It is an arithmetic number, because the mean of its divisors is an integer number (105333).

2²⁸⁰⁸⁸⁶ is an apocalyptic number.

280886 is a deficient number, since it is larger than the sum of its proper divisors (140446).

280886 is a wasteful number, since it uses less digits than its factorization.

280886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140445.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 280886 is about 529.9867922883. The cubic root of 280886 is about 65.4902574714.

The spelling of 280886 in words is "two hundred eighty thousand, eight hundred eighty-six".