285293228 has 12 divisors (see below), whose sum is σ = 544650792. Its totient is φ = 129678720.

The previous prime is 285293207. The next prime is 285293231. The reversal of 285293228 is 822392582.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3241925 + ... + 3242012.

It is an arithmetic number, because the mean of its divisors is an integer number (45387566).

Almost surely, 2^285293228 is an apocalyptic number.

It is an amenable number.

285293228 is a deficient number, since it is larger than the sum of its proper divisors (259357564).

285293228 is a wasteful number, since it uses less digits than its factorization.

285293228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6483952 (or 6483950 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 285293228 is about 16890.6254472710. The cubic root of 285293228 is about 658.3100536481.

The spelling of 285293228 in words is "two hundred eighty-five million, two hundred ninety-three thousand, two hundred twenty-eight".