285745216 has 21 divisors (see below), whose sum is σ = 567294141. Its totient is φ = 142804992.

The previous prime is 285745211. The next prime is 285745217. The reversal of 285745216 is 612547582.

The square root of 285745216 is 16904.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 270400 + 285474816 = 520^2 + 16896^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285745211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 134176 + ... + 136288.

Almost surely, 2^285745216 is an apocalyptic number.

285745216 is the 16904-th square number.

It is an amenable number.

285745216 is a deficient number, since it is larger than the sum of its proper divisors (281548925).

285745216 is an frugal number, since it uses more digits than its factorization.

285745216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4238 (or 2115 counting only the distinct ones).

The product of its digits is 134400, while the sum is 40.

The cubic root of 285745216 is about 658.6575221694.

The spelling of 285745216 in words is "two hundred eighty-five million, seven hundred forty-five thousand, two hundred sixteen".