27988416678 has 64 divisors (see below), whose sum is σ = 60613344000. Its totient is φ = 8585668224.

The previous prime is 27988416671. The next prime is 27988416689. The reversal of 27988416678 is 87661488972.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27988416671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2774628 + ... + 2784696.

It is an arithmetic number, because the mean of its divisors is an integer number (947083500).

Almost surely, 2^27988416678 is an apocalyptic number.

27988416678 is an abundant number, since it is smaller than the sum of its proper divisors (32624927322).

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

27988416678 is a wasteful number, since it uses less digits than its factorization.

27988416678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10789.

The product of its digits is 65028096, while the sum is 66.

The spelling of 27988416678 in words is "twenty-seven billion, nine hundred eighty-eight million, four hundred sixteen thousand, six hundred seventy-eight".