27689489 has 4 divisors (see below), whose sum is σ = 27700260. Its totient is φ = 27678720.

The previous prime is 27689483. The next prime is 27689491. The reversal of 27689489 is 98498672.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 16265089 + 11424400 = 4033^2 + 3380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27689489 is a prime.

It is a super-2 number, since 2×27689489² = 1533415602162242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27689489.

It is not an unprimeable number, because it can be changed into a prime (27689483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977 + ... + 7505.

It is an arithmetic number, because the mean of its divisors is an integer number (6925065).

Almost surely, 2^27689489 is an apocalyptic number.

It is an amenable number.

27689489 is a deficient number, since it is larger than the sum of its proper divisors (10771).

27689489 is an equidigital number, since it uses as much as digits as its factorization.

27689489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10770.

The product of its digits is 1741824, while the sum is 53.

The square root of 27689489 is about 5262.0802920518. The cubic root of 27689489 is about 302.5322288818.

The spelling of 27689489 in words is "twenty-seven million, six hundred eighty-nine thousand, four hundred eighty-nine".