238138011 has 6 divisors (see below), whose sum is σ = 343977140. Its totient is φ = 158758668.

The previous prime is 238138009. The next prime is 238138013. The reversal of 238138011 is 110831832.

It is an interprime number because it is at equal distance from previous prime (238138009) and next prime (238138013).

It is not a de Polignac number, because 238138011 - 2¹ = 238138009 is a prime.

It is a super-2 number, since 2×238138011² = 113419424566072242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238138013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13229881 + ... + 13229898.

Almost surely, 2^238138011 is an apocalyptic number.

238138011 is a deficient number, since it is larger than the sum of its proper divisors (105839129).

238138011 is a wasteful number, since it uses less digits than its factorization.

238138011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26459785 (or 26459782 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 238138011 is about 15431.7209344907. The cubic root of 238138011 is about 619.8352068096.

Adding to 238138011 its reverse (110831832), we get a palindrome (348969843).

The spelling of 238138011 in words is "two hundred thirty-eight million, one hundred thirty-eight thousand, eleven".