2871216 has 60 divisors (see below), whose sum is σ = 8150272. Its totient is φ = 943488.

The previous prime is 2871199. The next prime is 2871221. The reversal of 2871216 is 6121782.

It is a self number, because there is not a number n which added to its sum of digits gives 2871216.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18210 + ... + 18366.

2^2871216 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 2871216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4075136).

2871216 is an abundant number, since it is smaller than the sum of its proper divisors (5279056).

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

2871216 is a wasteful number, since it uses less digits than its factorization.

2871216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 289 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 2871216 is about 1694.4662876552. The cubic root of 2871216 is about 142.1309378778.

Adding to 2871216 its reverse (6121782), we get a palindrome (8992998).

The spelling of 2871216 in words is "two million, eight hundred seventy-one thousand, two hundred sixteen".