216319760 has 80 divisors (see below), whose sum is σ = 522127296. Its totient is φ = 83280384.

The previous prime is 216319759. The next prime is 216319771. The reversal of 216319760 is 67913612.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 216319760.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316379 + ... + 317061.

Almost surely, 2^216319760 is an apocalyptic number.

216319760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216319760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261063648).

216319760 is an abundant number, since it is smaller than the sum of its proper divisors (305807536).

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

216319760 is a wasteful number, since it uses less digits than its factorization.

216319760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840 (or 834 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 216319760 is about 14707.8128897535. The cubic root of 216319760 is about 600.2959280943.

The spelling of 216319760 in words is "two hundred sixteen million, three hundred nineteen thousand, seven hundred sixty".