27681716 has 6 divisors (see below), whose sum is σ = 48443010. Its totient is φ = 13840856.

The previous prime is 27681707. The next prime is 27681721. The reversal of 27681716 is 61718672.

It can be written as a sum of positive squares in only one way, i.e., 19536400 + 8145316 = 4420^2 + 2854^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 27681716.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 3460211 + ... + 3460218.

It is an arithmetic number, because the mean of its divisors is an integer number (8073835).

Almost surely, 2^27681716 is an apocalyptic number.

It is an amenable number.

27681716 is a deficient number, since it is larger than the sum of its proper divisors (20761294).

27681716 is a wasteful number, since it uses less digits than its factorization.

27681716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6920433 (or 6920431 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 27681716 is about 5261.3416539890. The cubic root of 27681716 is about 302.5039172591.

The spelling of 27681716 in words is "twenty-seven million, six hundred eighty-one thousand, seven hundred sixteen".