27984709784 has 8 divisors (see below), whose sum is σ = 52471330860. Its totient is φ = 13992354888.

The previous prime is 27984709769. The next prime is 27984709789. The reversal of 27984709784 is 48790748972.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 27984709784.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27984709789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1749044354 + ... + 1749044369.

Almost surely, 2^27984709784 is an apocalyptic number.

It is an amenable number.

27984709784 is a deficient number, since it is larger than the sum of its proper divisors (24486621076).

27984709784 is a wasteful number, since it uses less digits than its factorization.

27984709784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3498088729 (or 3498088725 counting only the distinct ones).

The product of its (nonzero) digits is 56899584, while the sum is 65.

The spelling of 27984709784 in words is "twenty-seven billion, nine hundred eighty-four million, seven hundred nine thousand, seven hundred eighty-four".