238238881 has 4 divisors (see below), whose sum is σ = 238291200. Its totient is φ = 238186564.

The previous prime is 238238879. The next prime is 238238921. The reversal of 238238881 is 188832832.

238238881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 238238881 - 2¹ = 238238879 is a prime.

It is a super-2 number, since 2×238238881² = 113515528840264322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238238981) 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, 18601 + ... + 28678.

It is an arithmetic number, because the mean of its divisors is an integer number (59572800).

Almost surely, 2^238238881 is an apocalyptic number.

It is an amenable number.

238238881 is a deficient number, since it is larger than the sum of its proper divisors (52319).

238238881 is an equidigital number, since it uses as much as digits as its factorization.

238238881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52318.

The product of its digits is 147456, while the sum is 43.

The square root of 238238881 is about 15434.9888564910. The cubic root of 238238881 is about 619.9227106222.

The spelling of 238238881 in words is "two hundred thirty-eight million, two hundred thirty-eight thousand, eight hundred eighty-one".