280180 has 12 divisors (see below), whose sum is σ = 588420. Its totient is φ = 112064.

The previous prime is 280139. The next prime is 280183. The reversal of 280180 is 81082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 163216 + 116964 = 404^2 + 342^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280183) by changing a digit.

280180 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, 6985 + ... + 7024.

It is an arithmetic number, because the mean of its divisors is an integer number (49035).

2²⁸⁰¹⁸⁰ is an apocalyptic number.

280180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280180 is an abundant number, since it is smaller than the sum of its proper divisors (308240).

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

280180 is a wasteful number, since it uses less digits than its factorization.

280180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14018 (or 14016 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 280180 is about 529.3203188996. The cubic root of 280180 is about 65.4353420564.

The spelling of 280180 in words is "two hundred eighty thousand, one hundred eighty".