285286660 has 12 divisors (see below), whose sum is σ = 599102028. Its totient is φ = 114114656.

The previous prime is 285286657. The next prime is 285286679. The reversal of 285286660 is 66682582.

It can be written as a sum of positive squares in 2 ways, for example, as 51380224 + 233906436 = 7168^2 + 15294^2 .

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, 7132147 + ... + 7132186.

It is an arithmetic number, because the mean of its divisors is an integer number (49925169).

Almost surely, 2^285286660 is an apocalyptic number.

285286660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285286660 is an abundant number, since it is smaller than the sum of its proper divisors (313815368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285286660 is a wasteful number, since it uses less digits than its factorization.

285286660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14264342 (or 14264340 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 285286660 is about 16890.4310187751. The cubic root of 285286660 is about 658.3050017539.

The spelling of 285286660 in words is "two hundred eighty-five million, two hundred eighty-six thousand, six hundred sixty".