280683085 has 4 divisors (see below), whose sum is σ = 336819708. Its totient is φ = 224546464.

The previous prime is 280683061. The next prime is 280683097. The reversal of 280683085 is 580386082.

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

It can be written as a sum of positive squares in 2 ways, for example, as 139287204 + 141395881 = 11802^2 + 11891^2 .

It is a cyclic number.

It is not a de Polignac number, because 280683085 - 2¹⁹ = 280158797 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28068304 + ... + 28068313.

It is an arithmetic number, because the mean of its divisors is an integer number (84204927).

Almost surely, 2^280683085 is an apocalyptic number.

It is an amenable number.

280683085 is a deficient number, since it is larger than the sum of its proper divisors (56136623).

280683085 is an equidigital number, since it uses as much as digits as its factorization.

280683085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56136622.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 280683085 is about 16753.5991655525. The cubic root of 280683085 is about 654.7448338877.

The spelling of 280683085 in words is "two hundred eighty million, six hundred eighty-three thousand, eighty-five".