280885 has 8 divisors (see below), whose sum is σ = 367776. Its totient is φ = 204240.

The previous prime is 280883. The next prime is 280897. The reversal of 280885 is 588082.

280885 = T₂₃₂ + T₂₃₃ + ... + T₂₄₁.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 280885 - 2¹ = 280883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2499 + ... + 2608.

It is an arithmetic number, because the mean of its divisors is an integer number (45972).

2²⁸⁰⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

280885 is a deficient number, since it is larger than the sum of its proper divisors (86891).

280885 is a wasteful number, since it uses less digits than its factorization.

280885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 280885 is about 529.9858488677. The cubic root of 280885 is about 65.4901797526.

The spelling of 280885 in words is "two hundred eighty thousand, eight hundred eighty-five".