280992 has 24 divisors (see below), whose sum is σ = 737856. Its totient is φ = 93632.

The previous prime is 280979. The next prime is 280997. The reversal of 280992 is 299082.

It is a tau number, because it is divible by the number of its divisors (24).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280992.

It is not an unprimeable number, because it can be changed into a prime (280997) by changing a digit.

280992 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, 1368 + ... + 1559.

It is an arithmetic number, because the mean of its divisors is an integer number (30744).

2²⁸⁰⁹⁹² is an apocalyptic number.

It is an amenable number.

280992 is an abundant number, since it is smaller than the sum of its proper divisors (456864).

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

280992 is a wasteful number, since it uses less digits than its factorization.

280992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940 (or 2932 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 280992 is about 530.0867853475. The cubic root of 280992 is about 65.4984946141.

The spelling of 280992 in words is "two hundred eighty thousand, nine hundred ninety-two".