27958948138 has 8 divisors (see below), whose sum is σ = 45751006080. Its totient is φ = 12708612780.

The previous prime is 27958948133. The next prime is 27958948177. The reversal of 27958948138 is 83184985972.

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 27958948138.

It is not an unprimeable number, because it can be changed into a prime (27958948133) by changing a digit.

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, 635430618 + ... + 635430661.

It is an arithmetic number, because the mean of its divisors is an integer number (5718875760).

Almost surely, 2^27958948138 is an apocalyptic number.

27958948138 is a deficient number, since it is larger than the sum of its proper divisors (17792057942).

27958948138 is a wasteful number, since it uses less digits than its factorization.

27958948138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270861292.

The product of its digits is 34836480, while the sum is 64.

The spelling of 27958948138 in words is "twenty-seven billion, nine hundred fifty-eight million, nine hundred forty-eight thousand, one hundred thirty-eight".