68157238 has 8 divisors (see below), whose sum is σ = 104411232. Its totient is φ = 33353496.

The previous prime is 68157223. The next prime is 68157241. The reversal of 68157238 is 83275186.

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

It is a self number, because there is not a number n which added to its sum of digits gives 68157238.

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 3 ways as a sum of consecutive naturals, for example, 362445 + ... + 362632.

It is an arithmetic number, because the mean of its divisors is an integer number (13051404).

Almost surely, 2^68157238 is an apocalyptic number.

68157238 is a deficient number, since it is larger than the sum of its proper divisors (36253994).

68157238 is a wasteful number, since it uses less digits than its factorization.

68157238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725126.

The product of its digits is 80640, while the sum is 40.

The square root of 68157238 is about 8255.7397003539. The cubic root of 68157238 is about 408.4798715854.

The spelling of 68157238 in words is "sixty-eight million, one hundred fifty-seven thousand, two hundred thirty-eight".