280998 has 24 divisors (see below), whose sum is σ = 620568. Its totient is φ = 91872.

The previous prime is 280997. The next prime is 281023. The reversal of 280998 is 899082.

It is a Curzon number.

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 280998.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1090 + ... + 1322.

It is an arithmetic number, because the mean of its divisors is an integer number (25857).

2²⁸⁰⁹⁹⁸ is an apocalyptic number.

280998 is an abundant number, since it is smaller than the sum of its proper divisors (339570).

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

280998 is a wasteful number, since it uses less digits than its factorization.

280998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 280998 is about 530.0924447679. The cubic root of 280998 is about 65.4989608055.

The spelling of 280998 in words is "two hundred eighty thousand, nine hundred ninety-eight".