27978857283 has 8 divisors (see below), whose sum is σ = 40174769488. Its totient is φ = 17217758304.

The previous prime is 27978857281. The next prime is 27978857297. The reversal of 27978857283 is 38275887972.

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

It is not a de Polignac number, because 27978857283 - 2¹ = 27978857281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27978857281) 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 7 ways as a sum of consecutive naturals, for example, 358703260 + ... + 358703337.

It is an arithmetic number, because the mean of its divisors is an integer number (5021846186).

Almost surely, 2^27978857283 is an apocalyptic number.

27978857283 is a deficient number, since it is larger than the sum of its proper divisors (12195912205).

27978857283 is a wasteful number, since it uses less digits than its factorization.

27978857283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717406613.

The product of its digits is 94832640, while the sum is 66.

The spelling of 27978857283 in words is "twenty-seven billion, nine hundred seventy-eight million, eight hundred fifty-seven thousand, two hundred eighty-three".