27990984808 has 16 divisors (see below), whose sum is σ = 52485706980. Its totient is φ = 13994796288.

The previous prime is 27990984799. The next prime is 27990984809. The reversal of 27990984808 is 80848909972.

It can be written as a sum of positive squares in 2 ways, for example, as 27983267524 + 7717284 = 167282^2 + 2778^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 27990984808.

It is not an unprimeable number, because it can be changed into a prime (27990984809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110160 + ... + 260992.

Almost surely, 2^27990984808 is an apocalyptic number.

It is an amenable number.

27990984808 is a deficient number, since it is larger than the sum of its proper divisors (24494722172).

27990984808 is a wasteful number, since it uses less digits than its factorization.

27990984808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174036 (or 174032 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 64.

The spelling of 27990984808 in words is "twenty-seven billion, nine hundred ninety million, nine hundred eighty-four thousand, eight hundred eight".