238823285 has 4 divisors (see below), whose sum is σ = 286587948. Its totient is φ = 191058624.

The previous prime is 238823281. The next prime is 238823317. The reversal of 238823285 is 582328832.

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 143448529 + 95374756 = 11977^2 + 9766^2 .

It is a cyclic number.

It is not a de Polignac number, because 238823285 - 2² = 238823281 is a prime.

It is a super-2 number, since 2×238823285² = 114073122916382450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238823281) 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, 23882324 + ... + 23882333.

It is an arithmetic number, because the mean of its divisors is an integer number (71646987).

Almost surely, 2^238823285 is an apocalyptic number.

It is an amenable number.

238823285 is a deficient number, since it is larger than the sum of its proper divisors (47764663).

238823285 is an equidigital number, since it uses as much as digits as its factorization.

238823285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47764662.

The product of its digits is 184320, while the sum is 41.

The square root of 238823285 is about 15453.9084053193. The cubic root of 238823285 is about 620.4291903407.

The spelling of 238823285 in words is "two hundred thirty-eight million, eight hundred twenty-three thousand, two hundred eighty-five".