238395881 has 8 divisors (see below), whose sum is σ = 242266824. Its totient is φ = 234541440.

The previous prime is 238395779. The next prime is 238395887. The reversal of 238395881 is 188593832.

It can be written as a sum of positive squares in 4 ways, for example, as 13875625 + 224520256 = 3725^2 + 14984^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 238395881 - 2¹⁴ = 238379497 is a prime.

It is a super-2 number, since 2×238395881² = 113665192155532322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238395887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26855 + ... + 34611.

It is an arithmetic number, because the mean of its divisors is an integer number (30283353).

Almost surely, 2^238395881 is an apocalyptic number.

It is an amenable number.

238395881 is a deficient number, since it is larger than the sum of its proper divisors (3870943).

238395881 is an equidigital number, since it uses as much as digits as its factorization.

238395881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8251.

The product of its digits is 414720, while the sum is 47.

The square root of 238395881 is about 15440.0738664036. The cubic root of 238395881 is about 620.0588575758.

The spelling of 238395881 in words is "two hundred thirty-eight million, three hundred ninety-five thousand, eight hundred eighty-one".