280972 has 12 divisors (see below), whose sum is σ = 517720. Its totient is φ = 133056.

The previous prime is 280967. The next prime is 280979. The reversal of 280972 is 279082.

It is a self number, because there is not a number n which added to its sum of digits gives 280972.

It is not an unprimeable number, because it can be changed into a prime (280979) by changing a digit.

280972 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 3 ways as a sum of consecutive naturals, for example, 1773 + ... + 1924.

2²⁸⁰⁹⁷² is an apocalyptic number.

It is an amenable number.

280972 is a deficient number, since it is larger than the sum of its proper divisors (236748).

280972 is a wasteful number, since it uses less digits than its factorization.

280972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3720 (or 3718 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 280972 is about 530.0679201763. The cubic root of 280972 is about 65.4969405948.

The spelling of 280972 in words is "two hundred eighty thousand, nine hundred seventy-two".