216944208 has 180 divisors, whose sum is σ = 696301788. Its totient is φ = 62668800.

The previous prime is 216944201. The next prime is 216944213. The reversal of 216944208 is 802449612.

216944208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 39841344 + 177102864 = 6312^2 + 13308^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216944201) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 540808 + ... + 541208.

Almost surely, 2^216944208 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 216944208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (348150894).

216944208 is an abundant number, since it is smaller than the sum of its proper divisors (479357580).

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

216944208 is a wasteful number, since it uses less digits than its factorization.

216944208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 216944208 is about 14729.0260370467. The cubic root of 216944208 is about 600.8729958477.

The spelling of 216944208 in words is "two hundred sixteen million, nine hundred forty-four thousand, two hundred eight".