216488718 has 12 divisors (see below), whose sum is σ = 469058928. Its totient is φ = 72162900.

The previous prime is 216488711. The next prime is 216488731. The reversal of 216488718 is 817884612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216488711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6013558 + ... + 6013593.

It is an arithmetic number, because the mean of its divisors is an integer number (39088244).

Almost surely, 2^216488718 is an apocalyptic number.

216488718 is an abundant number, since it is smaller than the sum of its proper divisors (252570210).

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

216488718 is a wasteful number, since it uses less digits than its factorization.

216488718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12027159 (or 12027156 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 216488718 is about 14713.5555866011. Note that the first 4 decimals coincide. The cubic root of 216488718 is about 600.4521758095.

The spelling of 216488718 in words is "two hundred sixteen million, four hundred eighty-eight thousand, seven hundred eighteen".