27871878285 has 48 divisors (see below), whose sum is σ = 50450400000. Its totient is φ = 14207795712.

The previous prime is 27871878283. The next prime is 27871878313. The reversal of 27871878285 is 58287817872.

27871878285 is a `hidden beast` number, since 278 + 7 + 1 + 87 + 8 + 285 = 666.

It is not a de Polignac number, because 27871878285 - 2¹ = 27871878283 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27871878283) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1438341 + ... + 1457589.

It is an arithmetic number, because the mean of its divisors is an integer number (1051050000).

Almost surely, 2^27871878285 is an apocalyptic number.

It is an amenable number.

27871878285 is a deficient number, since it is larger than the sum of its proper divisors (22578521715).

27871878285 is a wasteful number, since it uses less digits than its factorization.

27871878285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20682 (or 20679 counting only the distinct ones).

The product of its digits is 28098560, while the sum is 63.

The spelling of 27871878285 in words is "twenty-seven billion, eight hundred seventy-one million, eight hundred seventy-eight thousand, two hundred eighty-five".