27681129 has 48 divisors (see below), whose sum is σ = 48627840. Its totient is φ = 15558480.

The previous prime is 27681113. The next prime is 27681133. The reversal of 27681129 is 92118672.

It is not a de Polignac number, because 27681129 - 2⁴ = 27681113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27681093 and 27681102.

It is not an unprimeable number, because it can be changed into a prime (27680129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 453759 + ... + 453819.

It is an arithmetic number, because the mean of its divisors is an integer number (1013080).

Almost surely, 2^27681129 is an apocalyptic number.

It is an amenable number.

27681129 is a deficient number, since it is larger than the sum of its proper divisors (20946711).

27681129 is an frugal number, since it uses more digits than its factorization.

27681129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 71 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 27681129 is about 5261.2858694429. The cubic root of 27681129 is about 302.5017790119.

The spelling of 27681129 in words is "twenty-seven million, six hundred eighty-one thousand, one hundred twenty-nine".