216944468 has 24 divisors (see below), whose sum is σ = 419910792. Its totient is φ = 97421184.

The previous prime is 216944449. The next prime is 216944473. The reversal of 216944468 is 864449612.

It can be written as a sum of positive squares in 4 ways, for example, as 41964484 + 174979984 = 6478^2 + 13228^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54455 + ... + 58302.

It is an arithmetic number, because the mean of its divisors is an integer number (17496283).

Almost surely, 2^216944468 is an apocalyptic number.

It is an amenable number.

216944468 is a deficient number, since it is larger than the sum of its proper divisors (202966324).

216944468 is a wasteful number, since it uses less digits than its factorization.

216944468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112811 (or 112809 counting only the distinct ones).

The product of its digits is 331776, while the sum is 44.

The square root of 216944468 is about 14729.0348631538. The cubic root of 216944468 is about 600.8732358893.

It can be divided in two parts, 21694 and 4468, that added together give a palindrome (26162).

The spelling of 216944468 in words is "two hundred sixteen million, nine hundred forty-four thousand, four hundred sixty-eight".