27858439327012 has 48 divisors (see below), whose sum is σ = 55812015608832. Its totient is φ = 11918951095680.

The previous prime is 27858439326961. The next prime is 27858439327031. The reversal of 27858439327012 is 21072393485872.

It is a happy 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 15 ways as a sum of consecutive naturals, for example, 106153837 + ... + 106415947.

It is an arithmetic number, because the mean of its divisors is an integer number (1162750325184).

Almost surely, 2^{27858439327012} is an apocalyptic number.

It is an amenable number.

27858439327012 is an abundant number, since it is smaller than the sum of its proper divisors (27953576281820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27858439327012 is a wasteful number, since it uses less digits than its factorization.

27858439327012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268588 (or 268586 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 61.

The spelling of 27858439327012 in words is "twenty-seven trillion, eight hundred fifty-eight billion, four hundred thirty-nine million, three hundred twenty-seven thousand, twelve".