27690489 has 6 divisors (see below), whose sum is σ = 39997386. Its totient is φ = 18460320.

The previous prime is 27690449. The next prime is 27690491. The reversal of 27690489 is 98409672.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21930489 + 5760000 = 4683^2 + 2400^2 .

It is not a de Polignac number, because 27690489 - 2⁸ = 27690233 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27690449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1538352 + ... + 1538369.

It is an arithmetic number, because the mean of its divisors is an integer number (6666231).

Almost surely, 2^27690489 is an apocalyptic number.

It is an amenable number.

27690489 is a deficient number, since it is larger than the sum of its proper divisors (12306897).

27690489 is a wasteful number, since it uses less digits than its factorization.

27690489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076727 (or 3076724 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 27690489 is about 5262.1753106486. The cubic root of 27690489 is about 302.5358708003.

The spelling of 27690489 in words is "twenty-seven million, six hundred ninety thousand, four hundred eighty-nine".