27897289 has 8 divisors (see below), whose sum is σ = 33758208. Its totient is φ = 22505280.

The previous prime is 27897283. The next prime is 27897293. The reversal of 27897289 is 98279872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27897289 - 2³ = 27897281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27897281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117097 + ... + 117334.

It is an arithmetic number, because the mean of its divisors is an integer number (4219776).

Almost surely, 2^27897289 is an apocalyptic number.

It is an amenable number.

27897289 is a deficient number, since it is larger than the sum of its proper divisors (5860919).

27897289 is a wasteful number, since it uses less digits than its factorization.

27897289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234455.

The product of its digits is 1016064, while the sum is 52.

The square root of 27897289 is about 5281.7884281747. The cubic root of 27897289 is about 303.2871433378.

The spelling of 27897289 in words is "twenty-seven million, eight hundred ninety-seven thousand, two hundred eighty-nine".