27716643 has 6 divisors (see below), whose sum is σ = 40035164. Its totient is φ = 18477756.

The previous prime is 27716641. The next prime is 27716653. The reversal of 27716643 is 34661772.

27716643 is a `hidden beast` number, since 2 + 7 + 7 + 1 + 6 + 643 = 666.

It is not a de Polignac number, because 27716643 - 2¹ = 27716641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27716598 and 27716607.

It is not an unprimeable number, because it can be changed into a prime (27716641) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1539805 + ... + 1539822.

Almost surely, 2^27716643 is an apocalyptic number.

27716643 is a deficient number, since it is larger than the sum of its proper divisors (12318521).

27716643 is a wasteful number, since it uses less digits than its factorization.

27716643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3079633 (or 3079630 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 27716643 is about 5264.6598180699. The cubic root of 27716643 is about 302.6310904178.

The spelling of 27716643 in words is "twenty-seven million, seven hundred sixteen thousand, six hundred forty-three".