238686345 has 20 divisors (see below), whose sum is σ = 427868100. Its totient is φ = 127299168.

The previous prime is 238686299. The next prime is 238686367. The reversal of 238686345 is 543686832.

It is a happy number.

238686345 is a `hidden beast` number, since 2 + 3 + 8 + 6 + 8 + 634 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 44836416 + 193849929 = 6696^2 + 13923^2 .

It is not a de Polignac number, because 238686345 - 2⁸ = 238686089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 238686345.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 294270 + ... + 295079.

It is an arithmetic number, because the mean of its divisors is an integer number (21393405).

Almost surely, 2^238686345 is an apocalyptic number.

It is an amenable number.

238686345 is a deficient number, since it is larger than the sum of its proper divisors (189181755).

238686345 is an equidigital number, since it uses as much as digits as its factorization.

238686345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589366 (or 589357 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 238686345 is about 15449.4771756199. The cubic root of 238686345 is about 620.3105840703.

The spelling of 238686345 in words is "two hundred thirty-eight million, six hundred eighty-six thousand, three hundred forty-five".