27676561 has 24 divisors (see below), whose sum is σ = 33150816. Its totient is φ = 22830720.

The previous prime is 27676541. The next prime is 27676589. The reversal of 27676561 is 16567672.

It is a happy number.

It is not a de Polignac number, because 27676561 - 2¹¹ = 27674513 is a prime.

It is an alternating number because its digits alternate between even and odd.

Its product of digits (105840) is a multiple of the sum of its prime factors (189).

It is not an unprimeable number, because it can be changed into a prime (27676531) 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 23 ways as a sum of consecutive naturals, for example, 413050 + ... + 413116.

It is an arithmetic number, because the mean of its divisors is an integer number (1381284).

Almost surely, 2^27676561 is an apocalyptic number.

It is an amenable number.

27676561 is a deficient number, since it is larger than the sum of its proper divisors (5474255).

27676561 is a wasteful number, since it uses less digits than its factorization.

27676561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 142 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 27676561 is about 5260.8517371239. The cubic root of 27676561 is about 302.4851382631.

Subtracting from 27676561 its reverse (16567672), we obtain a square (11108889 = 3333²).

The spelling of 27676561 in words is "twenty-seven million, six hundred seventy-six thousand, five hundred sixty-one".