286628081 has 8 divisors (see below), whose sum is σ = 296826984. Its totient is φ = 276606720.

The previous prime is 286628071. The next prime is 286628087. The reversal of 286628081 is 180826682.

It can be written as a sum of positive squares in 4 ways, for example, as 16321600 + 270306481 = 4040^2 + 16441^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-286628081 is a prime.

It is a super-2 number, since 2×286628081² = 164311313635485122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (286628087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41096 + ... + 47561.

It is an arithmetic number, because the mean of its divisors is an integer number (37103373).

Almost surely, 2^286628081 is an apocalyptic number.

It is an amenable number.

286628081 is a deficient number, since it is larger than the sum of its proper divisors (10198903).

286628081 is an equidigital number, since it uses as much as digits as its factorization.

286628081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88771.

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 286628081 is about 16930.0939453979. The cubic root of 286628081 is about 659.3351745853.

The spelling of 286628081 in words is "two hundred eighty-six million, six hundred twenty-eight thousand, eighty-one".