287216 has 20 divisors (see below), whose sum is σ = 576600. Its totient is φ = 138432.

The previous prime is 287191. The next prime is 287219. The reversal of 287216 is 612782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287219) by changing a digit.

287216 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155 + ... + 773.

It is an arithmetic number, because the mean of its divisors is an integer number (28830).

2²⁸⁷²¹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 287216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288300).

287216 is an abundant number, since it is smaller than the sum of its proper divisors (289384).

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

287216 is a wasteful number, since it uses less digits than its factorization.

287216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 650 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 287216 is about 535.9253679385. The cubic root of 287216 is about 65.9785666553.

Adding to 287216 its reverse (612782), we get a palindrome (899998).

The spelling of 287216 in words is "two hundred eighty-seven thousand, two hundred sixteen".