238669218 has 24 divisors (see below), whose sum is σ = 519138828. Its totient is φ = 79245312.

The previous prime is 238669213. The next prime is 238669237. The reversal of 238669218 is 812966832.

It can be written as a sum of positive squares in 2 ways, for example, as 142491969 + 96177249 = 11937^2 + 9807^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (238669213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21171 + ... + 30422.

Almost surely, 2^238669218 is an apocalyptic number.

238669218 is an abundant number, since it is smaller than the sum of its proper divisors (280469610).

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

238669218 is a wasteful number, since it uses less digits than its factorization.

238669218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51858 (or 51855 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 238669218 is about 15448.9228750745. The cubic root of 238669218 is about 620.2957468670.

The spelling of 238669218 in words is "two hundred thirty-eight million, six hundred sixty-nine thousand, two hundred eighteen".