216443376 has 60 divisors (see below), whose sum is σ = 611663728. Its totient is φ = 71442432.

The previous prime is 216443369. The next prime is 216443393. The reversal of 216443376 is 673344612.

It is a happy number.

216443376 is a `hidden beast` number, since 2 + 1 + 644 + 3 + 3 + 7 + 6 = 666.

It is a super-3 number, since 3×216443376³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 216443376.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7536 + ... + 22128.

Almost surely, 2^216443376 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 216443376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305831864).

216443376 is an abundant number, since it is smaller than the sum of its proper divisors (395220352).

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

216443376 is a wasteful number, since it uses less digits than its factorization.

216443376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14710 (or 14701 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 216443376 is about 14712.0146818850. The cubic root of 216443376 is about 600.4102527572.

Adding to 216443376 its reverse (673344612), we get a palindrome (889787988).

The spelling of 216443376 in words is "two hundred sixteen million, four hundred forty-three thousand, three hundred seventy-six".