280006 has 8 divisors (see below), whose sum is σ = 422784. Its totient is φ = 139080.

The previous prime is 280001. The next prime is 280009. The reversal of 280006 is 600082.

280006 = T₂₁₀ + T₂₁₁ + ... + T₂₂₁.

280006 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280001) by changing a digit.

280006 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16 + ... + 748.

It is an arithmetic number, because the mean of its divisors is an integer number (52848).

2²⁸⁰⁰⁰⁶ is an apocalyptic number.

280006 is a deficient number, since it is larger than the sum of its proper divisors (142778).

280006 is a wasteful number, since it uses less digits than its factorization.

280006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 280006 is about 529.1559316496. The cubic root of 280006 is about 65.4217934956.

Adding to 280006 its reverse (600082), we get a palindrome (880088).

It can be divided in two parts, 2 and 80006, that added together give a palindrome (80008).

The spelling of 280006 in words is "two hundred eighty thousand, six".