216879844 has 12 divisors (see below), whose sum is σ = 391783168. Its totient is φ = 104941800.

The previous prime is 216879841. The next prime is 216879853. The reversal of 216879844 is 448978612.

It is a happy number.

216879844 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (216879841) 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, 874392 + ... + 874639.

Almost surely, 2^216879844 is an apocalyptic number.

It is an amenable number.

216879844 is a deficient number, since it is larger than the sum of its proper divisors (174903324).

216879844 is a wasteful number, since it uses less digits than its factorization.

216879844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749066 (or 1749064 counting only the distinct ones).

The product of its digits is 774144, while the sum is 49.

The square root of 216879844 is about 14726.8409375534. The cubic root of 216879844 is about 600.8135667204.

The spelling of 216879844 in words is "two hundred sixteen million, eight hundred seventy-nine thousand, eight hundred forty-four".