238143686 has 8 divisors (see below), whose sum is σ = 389689704. Its totient is φ = 108247120.

The previous prime is 238143677. The next prime is 238143709. The reversal of 238143686 is 686341832.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5412335 + ... + 5412378.

It is an arithmetic number, because the mean of its divisors is an integer number (48711213).

Almost surely, 2^238143686 is an apocalyptic number.

238143686 is a deficient number, since it is larger than the sum of its proper divisors (151546018).

238143686 is a wasteful number, since it uses less digits than its factorization.

238143686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10824726.

The product of its digits is 165888, while the sum is 41.

The square root of 238143686 is about 15431.9048078972. The cubic root of 238143686 is about 619.8401304767.

The spelling of 238143686 in words is "two hundred thirty-eight million, one hundred forty-three thousand, six hundred eighty-six".