238820011 has 4 divisors (see below), whose sum is σ = 242091592. Its totient is φ = 235548432.

The previous prime is 238820009. The next prime is 238820047. The reversal of 238820011 is 110028832.

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 238820011 - 2¹ = 238820009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238820411) 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, 1635681 + ... + 1635826.

It is an arithmetic number, because the mean of its divisors is an integer number (60522898).

Almost surely, 2^238820011 is an apocalyptic number.

238820011 is a deficient number, since it is larger than the sum of its proper divisors (3271581).

238820011 is an equidigital number, since it uses as much as digits as its factorization.

238820011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3271580.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 238820011 is about 15453.8024770605. The cubic root of 238820011 is about 620.4263551977.

Adding to 238820011 its reverse (110028832), we get a palindrome (348848843).

The spelling of 238820011 in words is "two hundred thirty-eight million, eight hundred twenty thousand, eleven".