216347648 has 44 divisors (see below), whose sum is σ = 471825312. Its totient is φ = 98334720.

The previous prime is 216347647. The next prime is 216347657. The reversal of 216347648 is 846743612.

216347648 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (44).

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216347641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1661 + ... + 20867.

Almost surely, 2^216347648 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 216347648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235912656).

216347648 is an abundant number, since it is smaller than the sum of its proper divisors (255477664).

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

216347648 is a wasteful number, since it uses less digits than its factorization.

216347648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19238 (or 19220 counting only the distinct ones).

The product of its digits is 193536, while the sum is 41.

The square root of 216347648 is about 14708.7609267402. The cubic root of 216347648 is about 600.3217237552.

The spelling of 216347648 in words is "two hundred sixteen million, three hundred forty-seven thousand, six hundred forty-eight".