285000228 has 48 divisors (see below), whose sum is σ = 777784000. Its totient is φ = 89999424.

The previous prime is 285000227. The next prime is 285000253. The reversal of 285000228 is 822000582.

It is a super-3 number, since 3×285000228³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (285000227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67393 + ... + 71496.

Almost surely, 2^285000228 is an apocalyptic number.

It is an amenable number.

285000228 is an abundant number, since it is smaller than the sum of its proper divisors (492783772).

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

285000228 is a wasteful number, since it uses less digits than its factorization.

285000228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138921 (or 138913 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 285000228 is about 16881.9497689100. The cubic root of 285000228 is about 658.0846120133.

The spelling of 285000228 in words is "two hundred eighty-five million, two hundred twenty-eight", and thus it is an aban number.