280944 has 30 divisors (see below), whose sum is σ = 786656. Its totient is φ = 93600.

The previous prime is 280939. The next prime is 280949. The reversal of 280944 is 449082.

It is an interprime number because it is at equal distance from previous prime (280939) and next prime (280949).

It is a super-2 number, since 2×280944² = 157859062272, which contains 22 as substring.

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 280944.

It is not an unprimeable number, because it can be changed into a prime (280949) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 832 + ... + 1119.

2²⁸⁰⁹⁴⁴ is an apocalyptic number.

280944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

280944 is an abundant number, since it is smaller than the sum of its proper divisors (505712).

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

280944 is a wasteful number, since it uses less digits than its factorization.

280944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965 (or 1956 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 280944 is about 530.0415078086. The cubic root of 280944 is about 65.4947648439.

The spelling of 280944 in words is "two hundred eighty thousand, nine hundred forty-four".