27989099280 has 240 divisors, whose sum is σ = 98234712576. Its totient is φ = 7128253440.

The previous prime is 27989099279. The next prime is 27989099311. The reversal of 27989099280 is 8299098972.

27989099280 is a `hidden beast` number, since 279 + 89 + 0 + 9 + 9 + 280 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20384674 + ... + 20386046.

Almost surely, 2^27989099280 is an apocalyptic number.

27989099280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27989099280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49117356288).

27989099280 is an abundant number, since it is smaller than the sum of its proper divisors (70245613296).

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

27989099280 is a wasteful number, since it uses less digits than its factorization.

27989099280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646 (or 2637 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 63.

The spelling of 27989099280 in words is "twenty-seven billion, nine hundred eighty-nine million, ninety-nine thousand, two hundred eighty".