285138652 has 12 divisors (see below), whose sum is σ = 499576896. Its totient is φ = 142402400.

The previous prime is 285138649. The next prime is 285138677. The reversal of 285138652 is 256831582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37849 + ... + 44752.

It is an arithmetic number, because the mean of its divisors is an integer number (41631408).

Almost surely, 2^285138652 is an apocalyptic number.

It is an amenable number.

285138652 is a deficient number, since it is larger than the sum of its proper divisors (214438244).

285138652 is a wasteful number, since it uses less digits than its factorization.

285138652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83468 (or 83466 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The square root of 285138652 is about 16886.0490346321. The cubic root of 285138652 is about 658.1911381972.

The spelling of 285138652 in words is "two hundred eighty-five million, one hundred thirty-eight thousand, six hundred fifty-two".