27798940389 has 12 divisors (see below), whose sum is σ = 40741147328. Its totient is φ = 16847842440.

The previous prime is 27798940387. The next prime is 27798940423. The reversal of 27798940389 is 98304989772.

It is not a de Polignac number, because 27798940389 - 2¹ = 27798940387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27798940387) 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 11 ways as a sum of consecutive naturals, for example, 38290189 + ... + 38290914.

Almost surely, 2^27798940389 is an apocalyptic number.

It is an amenable number.

27798940389 is a deficient number, since it is larger than the sum of its proper divisors (12942206939).

27798940389 is a wasteful number, since it uses less digits than its factorization.

27798940389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76581128 (or 76581117 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 66.

The spelling of 27798940389 in words is "twenty-seven billion, seven hundred ninety-eight million, nine hundred forty thousand, three hundred eighty-nine".