285209228 has 24 divisors (see below), whose sum is σ = 526846320. Its totient is φ = 134723520.

The previous prime is 285209219. The next prime is 285209237. The reversal of 285209228 is 822902582.

285209228 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (285209219) and next prime (285209237).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 285209191 and 285209200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23318 + ... + 33378.

It is an arithmetic number, because the mean of its divisors is an integer number (21951930).

Almost surely, 2^285209228 is an apocalyptic number.

It is an amenable number.

285209228 is a deficient number, since it is larger than the sum of its proper divisors (241637092).

285209228 is a wasteful number, since it uses less digits than its factorization.

285209228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10457 (or 10455 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 285209228 is about 16888.1386777821. The cubic root of 285209228 is about 658.2454377055.

The spelling of 285209228 in words is "two hundred eighty-five million, two hundred nine thousand, two hundred twenty-eight".