216967688 has 48 divisors (see below), whose sum is σ = 498157200. Its totient is φ = 88089120.

The previous prime is 216967679. The next prime is 216967697. The reversal of 216967688 is 886769612.

It is an interprime number because it is at equal distance from previous prime (216967679) and next prime (216967697).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7118 + ... + 22013.

It is an arithmetic number, because the mean of its divisors is an integer number (10378275).

Almost surely, 2^216967688 is an apocalyptic number.

216967688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

216967688 is an abundant number, since it is smaller than the sum of its proper divisors (281189512).

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

216967688 is a wasteful number, since it uses less digits than its factorization.

216967688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29170 (or 29159 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 53.

The square root of 216967688 is about 14729.8230810828. The cubic root of 216967688 is about 600.8946726790.

The spelling of 216967688 in words is "two hundred sixteen million, nine hundred sixty-seven thousand, six hundred eighty-eight".