216768810 has 64 divisors (see below), whose sum is σ = 529990272. Its totient is φ = 56733696.

The previous prime is 216768809. The next prime is 216768817. The reversal of 216768810 is 18867612.

216768810 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216768810² = 93977433977632200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216768817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 474102 + ... + 474558.

It is an arithmetic number, because the mean of its divisors is an integer number (8281098).

Almost surely, 2^216768810 is an apocalyptic number.

216768810 is an abundant number, since it is smaller than the sum of its proper divisors (313221462).

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

216768810 is a wasteful number, since it uses less digits than its factorization.

216768810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 216768810 is about 14723.0706715685. The cubic root of 216768810 is about 600.7110182001.

The spelling of 216768810 in words is "two hundred sixteen million, seven hundred sixty-eight thousand, eight hundred ten".