285529988 has 6 divisors (see below), whose sum is σ = 499677486. Its totient is φ = 142764992.

The previous prime is 285529963. The next prime is 285529997. The reversal of 285529988 is 889925582.

It can be written as a sum of positive squares in only one way, i.e., 183277444 + 102252544 = 13538^2 + 10112^2 .

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 as a sum of consecutive naturals, namely, 35691245 + ... + 35691252.

It is an arithmetic number, because the mean of its divisors is an integer number (83279581).

Almost surely, 2^285529988 is an apocalyptic number.

It is an amenable number.

285529988 is a deficient number, since it is larger than the sum of its proper divisors (214147498).

285529988 is a wasteful number, since it uses less digits than its factorization.

285529988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71382501 (or 71382499 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 56.

The square root of 285529988 is about 16897.6326152512. The cubic root of 285529988 is about 658.4921100697.

The spelling of 285529988 in words is "two hundred eighty-five million, five hundred twenty-nine thousand, nine hundred eighty-eight".