216335808 has 168 divisors, whose sum is σ = 675668448. Its totient is φ = 65783808.

The previous prime is 216335807. The next prime is 216335809. The reversal of 216335808 is 808533612.

It is an interprime number because it is at equal distance from previous prime (216335807) and next prime (216335809).

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 (216335807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1250410 + ... + 1250582.

It is an arithmetic number, because the mean of its divisors is an integer number (4021836).

Almost surely, 2^216335808 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 216335808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337834224).

216335808 is an abundant number, since it is smaller than the sum of its proper divisors (459332640).

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

216335808 is a wasteful number, since it uses less digits than its factorization.

216335808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 216335808 is about 14708.3584400163. The cubic root of 216335808 is about 600.3107723398.

The spelling of 216335808 in words is "two hundred sixteen million, three hundred thirty-five thousand, eight hundred eight".