238861111 has 4 divisors (see below), whose sum is σ = 242225424. Its totient is φ = 235496800.

The previous prime is 238861109. The next prime is 238861151. The reversal of 238861111 is 111168832.

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 238861111 - 2¹ = 238861109 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238861151) 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, 1682050 + ... + 1682191.

It is an arithmetic number, because the mean of its divisors is an integer number (60556356).

Almost surely, 2^238861111 is an apocalyptic number.

238861111 is a deficient number, since it is larger than the sum of its proper divisors (3364313).

238861111 is an equidigital number, since it uses as much as digits as its factorization.

238861111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364312.

The product of its digits is 2304, while the sum is 31.

The square root of 238861111 is about 15455.1321896644. The cubic root of 238861111 is about 620.4619441481.

The spelling of 238861111 in words is "two hundred thirty-eight million, eight hundred sixty-one thousand, one hundred eleven".