27261689 has 12 divisors (see below), whose sum is σ = 34152804. Its totient is φ = 21569184.

The previous prime is 27261671. The next prime is 27261701. The reversal of 27261689 is 98616272.

It can be written as a sum of positive squares in 2 ways, for example, as 16483600 + 10778089 = 4060^2 + 3283^2 .

It is not a de Polignac number, because 27261689 - 2²⁰ = 26213113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27261629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20762 + ... + 22035.

It is an arithmetic number, because the mean of its divisors is an integer number (2846067).

Almost surely, 2^27261689 is an apocalyptic number.

It is an amenable number.

27261689 is a deficient number, since it is larger than the sum of its proper divisors (6891115).

27261689 is a wasteful number, since it uses less digits than its factorization.

27261689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42824 (or 42817 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 27261689 is about 5221.2727375612. The cubic root of 27261689 is about 300.9661039891.

The spelling of 27261689 in words is "twenty-seven million, two hundred sixty-one thousand, six hundred eighty-nine".