285239912 has 16 divisors (see below), whose sum is σ = 536445600. Its totient is φ = 142187760.

The previous prime is 285239893. The next prime is 285239921. The reversal of 285239912 is 219932582.

It is a self number, because there is not a number n which added to its sum of digits gives 285239912.

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, 51212 + ... + 56507.

It is an arithmetic number, because the mean of its divisors is an integer number (33527850).

Almost surely, 2^285239912 is an apocalyptic number.

It is an amenable number.

285239912 is a deficient number, since it is larger than the sum of its proper divisors (251205688).

285239912 is a wasteful number, since it uses less digits than its factorization.

285239912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108056 (or 108052 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 285239912 is about 16889.0471015981. The cubic root of 285239912 is about 658.2690424568.

The spelling of 285239912 in words is "two hundred eighty-five million, two hundred thirty-nine thousand, nine hundred twelve".