238497685 has 8 divisors (see below), whose sum is σ = 286280280. Its totient is φ = 190742784.

The previous prime is 238497667. The next prime is 238497713. The reversal of 238497685 is 586794832.

It can be written as a sum of positive squares in 4 ways, for example, as 36687249 + 201810436 = 6057^2 + 14206^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238497685 is a prime.

It is a super-2 number, since 2×238497685² = 113762291500718450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28681 + ... + 36049.

It is an arithmetic number, because the mean of its divisors is an integer number (35785035).

Almost surely, 2^238497685 is an apocalyptic number.

It is an amenable number.

238497685 is a deficient number, since it is larger than the sum of its proper divisors (47782595).

238497685 is an equidigital number, since it uses as much as digits as its factorization.

238497685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13847.

The product of its digits is 2903040, while the sum is 52.

The square root of 238497685 is about 15443.3702604062. The cubic root of 238497685 is about 620.1471078261.

The spelling of 238497685 in words is "two hundred thirty-eight million, four hundred ninety-seven thousand, six hundred eighty-five".