27851421238 has 8 divisors (see below), whose sum is σ = 42207824232. Its totient is φ = 13782146496.

The previous prime is 27851421229. The next prime is 27851421289. The reversal of 27851421238 is 83212415872.

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

It is a junction number, because it is equal to n+sod(n) for n = 27851421194 and 27851421203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71781820 + ... + 71782207.

It is an arithmetic number, because the mean of its divisors is an integer number (5275978029).

Almost surely, 2^27851421238 is an apocalyptic number.

27851421238 is a deficient number, since it is larger than the sum of its proper divisors (14356402994).

27851421238 is a wasteful number, since it uses less digits than its factorization.

27851421238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143564126.

The product of its digits is 215040, while the sum is 43.

The spelling of 27851421238 in words is "twenty-seven billion, eight hundred fifty-one million, four hundred twenty-one thousand, two hundred thirty-eight".