218340968 has 8 divisors (see below), whose sum is σ = 409389330. Its totient is φ = 109170480.

The previous prime is 218340961. The next prime is 218341037. The reversal of 218340968 is 869043812.

It can be written as a sum of positive squares in only one way, i.e., 171034084 + 47306884 = 13078^2 + 6878^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (218340961) by changing a digit.

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 as a sum of consecutive naturals, namely, 13646303 + ... + 13646318.

Almost surely, 2^218340968 is an apocalyptic number.

It is an amenable number.

218340968 is a deficient number, since it is larger than the sum of its proper divisors (191048362).

218340968 is a wasteful number, since it uses less digits than its factorization.

218340968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27292627 (or 27292623 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 218340968 is about 14776.3651822767. The cubic root of 218340968 is about 602.1597792241.

The spelling of 218340968 in words is "two hundred eighteen million, three hundred forty thousand, nine hundred sixty-eight".