285812836 has 27 divisors (see below), whose sum is σ = 511362579. Its totient is φ = 139778808.

The previous prime is 285812833. The next prime is 285812837. The reversal of 285812836 is 638218582.

The square root of 285812836 is 16906.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285812792 and 285812801.

It is not an unprimeable number, because it can be changed into a prime (285812833) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2671095 + ... + 2671201.

Almost surely, 2^285812836 is an apocalyptic number.

285812836 is the 16906-th square number.

It is an amenable number.

285812836 is a deficient number, since it is larger than the sum of its proper divisors (225549743).

285812836 is an equidigital number, since it uses as much as digits as its factorization.

285812836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 188 counting only the distinct ones).

The product of its digits is 184320, while the sum is 43.

The cubic root of 285812836 is about 658.7094739390.

The spelling of 285812836 in words is "two hundred eighty-five million, eight hundred twelve thousand, eight hundred thirty-six".