218342288 has 20 divisors (see below), whose sum is σ = 447923340. Its totient is φ = 102749184.

The previous prime is 218342287. The next prime is 218342321. The reversal of 218342288 is 882243812.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 59783824 + 158558464 = 7732^2 + 12592^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (218342287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401093 + ... + 401636.

It is an arithmetic number, because the mean of its divisors is an integer number (22396167).

Almost surely, 2^218342288 is an apocalyptic number.

It is an amenable number.

218342288 is an abundant number, since it is smaller than the sum of its proper divisors (229581052).

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

218342288 is a wasteful number, since it uses less digits than its factorization.

218342288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802754 (or 802748 counting only the distinct ones).

The product of its digits is 49152, while the sum is 38.

The square root of 218342288 is about 14776.4098481329. The cubic root of 218342288 is about 602.1609926921.

The spelling of 218342288 in words is "two hundred eighteen million, three hundred forty-two thousand, two hundred eighty-eight".