216986718 has 32 divisors (see below), whose sum is σ = 468228096. Its totient is φ = 66640608.

The previous prime is 216986711. The next prime is 216986743. The reversal of 216986718 is 817689612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216986711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45055 + ... + 49637.

It is an arithmetic number, because the mean of its divisors is an integer number (14632128).

Almost surely, 2^216986718 is an apocalyptic number.

216986718 is an abundant number, since it is smaller than the sum of its proper divisors (251241378).

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

216986718 is a wasteful number, since it uses less digits than its factorization.

216986718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5208.

The product of its digits is 290304, while the sum is 48.

The square root of 216986718 is about 14730.4690353023. The cubic root of 216986718 is about 600.9122401048.

The spelling of 216986718 in words is "two hundred sixteen million, nine hundred eighty-six thousand, seven hundred eighteen".