280072 has 16 divisors (see below), whose sum is σ = 565740. Its totient is φ = 129216.

The previous prime is 280069. The next prime is 280097. The reversal of 280072 is 270082.

It can be written as a sum of positive squares in 2 ways, for example, as 264196 + 15876 = 514^2 + 126^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1243 + ... + 1450.

2²⁸⁰⁰⁷² is an apocalyptic number.

It is an amenable number.

280072 is an abundant number, since it is smaller than the sum of its proper divisors (285668).

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

280072 is a wasteful number, since it uses less digits than its factorization.

280072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712 (or 2708 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 280072 is about 529.2182914450. The cubic root of 280072 is about 65.4269332654.

The spelling of 280072 in words is "two hundred eighty thousand, seventy-two".