238806385 has 4 divisors (see below), whose sum is σ = 286567668. Its totient is φ = 191045104.

The previous prime is 238806377. The next prime is 238806413. The reversal of 238806385 is 583608832.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25441936 + 213364449 = 5044^2 + 14607^2 .

It is a cyclic number.

It is not a de Polignac number, because 238806385 - 2³ = 238806377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23880634 + ... + 23880643.

It is an arithmetic number, because the mean of its divisors is an integer number (71641917).

Almost surely, 2^238806385 is an apocalyptic number.

It is an amenable number.

238806385 is a deficient number, since it is larger than the sum of its proper divisors (47761283).

238806385 is an equidigital number, since it uses as much as digits as its factorization.

238806385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47761282.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 238806385 is about 15453.3616084009. The cubic root of 238806385 is about 620.4145553905.

The spelling of 238806385 in words is "two hundred thirty-eight million, eight hundred six thousand, three hundred eighty-five".