238138535 has 4 divisors (see below), whose sum is σ = 285766248. Its totient is φ = 190510824.

The previous prime is 238138531. The next prime is 238138541. The reversal of 238138535 is 535831832.

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

It is a cyclic number.

It is not a de Polignac number, because 238138535 - 2² = 238138531 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238138531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23813849 + ... + 23813858.

It is an arithmetic number, because the mean of its divisors is an integer number (71441562).

Almost surely, 2^238138535 is an apocalyptic number.

238138535 is a deficient number, since it is larger than the sum of its proper divisors (47627713).

238138535 is an equidigital number, since it uses as much as digits as its factorization.

238138535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47627712.

The product of its digits is 86400, while the sum is 38.

The square root of 238138535 is about 15431.7379124971. The cubic root of 238138535 is about 619.8356614387.

The spelling of 238138535 in words is "two hundred thirty-eight million, one hundred thirty-eight thousand, five hundred thirty-five".