280550 has 24 divisors (see below), whose sum is σ = 541632. Its totient is φ = 108000.

The previous prime is 280549. The next prime is 280561. The reversal of 280550 is 55082.

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 280550.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1460 + ... + 1640.

It is an arithmetic number, because the mean of its divisors is an integer number (22568).

2²⁸⁰⁵⁵⁰ is an apocalyptic number.

280550 is a deficient number, since it is larger than the sum of its proper divisors (261082).

280550 is a wasteful number, since it uses less digits than its factorization.

280550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 280550 is about 529.6697084033. The cubic root of 280550 is about 65.4641335795.

The spelling of 280550 in words is "two hundred eighty thousand, five hundred fifty".