238331845 has 4 divisors (see below), whose sum is σ = 285998220. Its totient is φ = 190665472.

The previous prime is 238331759. The next prime is 238331851. The reversal of 238331845 is 548133832.

It is a Cunningham number, because it is equal to 15438²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 85784644 + 152547201 = 9262^2 + 12351^2 .

It is a cyclic number.

It is not a de Polignac number, because 238331845 - 2⁹ = 238331333 is a prime.

It is a super-2 number, since 2×238331845² = 113604136682208050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23833180 + ... + 23833189.

It is an arithmetic number, because the mean of its divisors is an integer number (71499555).

Almost surely, 2^238331845 is an apocalyptic number.

It is an amenable number.

238331845 is a deficient number, since it is larger than the sum of its proper divisors (47666375).

238331845 is an equidigital number, since it uses as much as digits as its factorization.

238331845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47666374.

The product of its digits is 69120, while the sum is 37.

The square root of 238331845 is about 15438.0000323876. Note that the first 4 decimals coincide. The cubic root of 238331845 is about 620.0033341826.

The spelling of 238331845 in words is "two hundred thirty-eight million, three hundred thirty-one thousand, eight hundred forty-five".