27681876 has 18 divisors (see below), whose sum is σ = 69973722. Its totient is φ = 9227280.

The previous prime is 27681869. The next prime is 27681877. The reversal of 27681876 is 67818672.

It can be written as a sum of positive squares in only one way, i.e., 20520900 + 7160976 = 4530^2 + 2676^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27681877) 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 in 5 ways as a sum of consecutive naturals, for example, 384435 + ... + 384506.

It is an arithmetic number, because the mean of its divisors is an integer number (3887429).

Almost surely, 2^27681876 is an apocalyptic number.

It is an amenable number.

27681876 is an abundant number, since it is smaller than the sum of its proper divisors (42291846).

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

27681876 is a wasteful number, since it uses less digits than its factorization.

27681876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768951 (or 768946 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 27681876 is about 5261.3568592142. The cubic root of 27681876 is about 302.5045000810.

The spelling of 27681876 in words is "twenty-seven million, six hundred eighty-one thousand, eight hundred seventy-six".