286680865 has 4 divisors (see below), whose sum is σ = 344017044. Its totient is φ = 229344688.

The previous prime is 286680859. The next prime is 286680883. The reversal of 286680865 is 568086682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568086682 = 2 ⋅284043341.

It can be written as a sum of positive squares in 2 ways, for example, as 76807696 + 209873169 = 8764^2 + 14487^2 .

It is a cyclic number.

It is not a de Polignac number, because 286680865 - 2⁹ = 286680353 is a prime.

It is a Duffinian 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, 28668082 + ... + 28668091.

It is an arithmetic number, because the mean of its divisors is an integer number (86004261).

Almost surely, 2^286680865 is an apocalyptic number.

It is an amenable number.

286680865 is a deficient number, since it is larger than the sum of its proper divisors (57336179).

286680865 is an equidigital number, since it uses as much as digits as its factorization.

286680865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57336178.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The square root of 286680865 is about 16931.6527545305. The cubic root of 286680865 is about 659.3756453952.

The spelling of 286680865 in words is "two hundred eighty-six million, six hundred eighty thousand, eight hundred sixty-five".