216528768 has 64 divisors (see below), whose sum is σ = 639070800. Its totient is φ = 72175104.

The previous prime is 216528757. The next prime is 216528803. The reversal of 216528768 is 867825612.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27871 + ... + 34782.

Almost surely, 2^216528768 is an apocalyptic number.

It is an amenable number.

216528768 is an abundant number, since it is smaller than the sum of its proper divisors (422542032).

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

216528768 is an equidigital number, since it uses as much as digits as its factorization.

216528768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62676 (or 62658 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 216528768 is about 14714.9165135246. The cubic root of 216528768 is about 600.4892010289.

The spelling of 216528768 in words is "two hundred sixteen million, five hundred twenty-eight thousand, seven hundred sixty-eight".