280895 has 4 divisors (see below), whose sum is σ = 337080. Its totient is φ = 224712.

The previous prime is 280883. The next prime is 280897. The reversal of 280895 is 598082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 280895 - 2⁴ = 280879 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28085 + ... + 28094.

It is an arithmetic number, because the mean of its divisors is an integer number (84270).

2²⁸⁰⁸⁹⁵ is an apocalyptic number.

280895 is a deficient number, since it is larger than the sum of its proper divisors (56185).

280895 is an equidigital number, since it uses as much as digits as its factorization.

280895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56184.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 280895 is about 529.9952829979. The cubic root of 280895 is about 65.4909569319.

The spelling of 280895 in words is "two hundred eighty thousand, eight hundred ninety-five".