285247216 has 20 divisors (see below), whose sum is σ = 585176832. Its totient is φ = 134233856.

The previous prime is 285247211. The next prime is 285247243. The reversal of 285247216 is 612742582.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285247211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524080 + ... + 524623.

Almost surely, 2^285247216 is an apocalyptic number.

It is an amenable number.

285247216 is an abundant number, since it is smaller than the sum of its proper divisors (299929616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285247216 is a wasteful number, since it uses less digits than its factorization.

285247216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048728 (or 1048722 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 285247216 is about 16889.2633350303. The cubic root of 285247216 is about 658.2746610675.

Adding to 285247216 its reverse (612742582), we get a palindrome (897989798).

The spelling of 285247216 in words is "two hundred eighty-five million, two hundred forty-seven thousand, two hundred sixteen".