280237216 has 48 divisors (see below), whose sum is σ = 638172864. Its totient is φ = 118646784.

The previous prime is 280237207. The next prime is 280237219. The reversal of 280237216 is 612732082.

It is not an unprimeable number, because it can be changed into a prime (280237219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11056 + ... + 26128.

It is an arithmetic number, because the mean of its divisors is an integer number (13295268).

Almost surely, 2^280237216 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 280237216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319086432).

280237216 is an abundant number, since it is smaller than the sum of its proper divisors (357935648).

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

280237216 is a wasteful number, since it uses less digits than its factorization.

280237216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15173 (or 15165 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 280237216 is about 16740.2872137846. The cubic root of 280237216 is about 654.3979597141.

Adding to 280237216 its reverse (612732082), we get a palindrome (892969298).

The spelling of 280237216 in words is "two hundred eighty million, two hundred thirty-seven thousand, two hundred sixteen".