27681232 has 20 divisors (see below), whose sum is σ = 54941796. Its totient is φ = 13502720.

The previous prime is 27681223. The next prime is 27681239. The reversal of 27681232 is 23218672.

It can be written as a sum of positive squares in 2 ways, for example, as 1915456 + 25765776 = 1384^2 + 5076^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27681194 and 27681203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27681239) 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 3 ways as a sum of consecutive naturals, for example, 20443 + ... + 21754.

Almost surely, 2^27681232 is an apocalyptic number.

It is an amenable number.

27681232 is a deficient number, since it is larger than the sum of its proper divisors (27260564).

27681232 is a wasteful number, since it uses less digits than its factorization.

27681232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42246 (or 42240 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 27681232 is about 5261.2956579155. The cubic root of 27681232 is about 302.5021542091.

The spelling of 27681232 in words is "twenty-seven million, six hundred eighty-one thousand, two hundred thirty-two".