27489221 has 8 divisors (see below), whose sum is σ = 29600640. Its totient is φ = 25432768.

The previous prime is 27489211. The next prime is 27489227. The reversal of 27489221 is 12298472.

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

It is a cyclic number.

It is not a de Polignac number, because 27489221 - 2¹⁸ = 27227077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27489227) 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, 12701 + ... + 14706.

It is an arithmetic number, because the mean of its divisors is an integer number (3700080).

Almost surely, 2^27489221 is an apocalyptic number.

It is an amenable number.

27489221 is a deficient number, since it is larger than the sum of its proper divisors (2111419).

27489221 is a wasteful number, since it uses less digits than its factorization.

27489221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27483.

The product of its digits is 16128, while the sum is 35.

The square root of 27489221 is about 5243.0164027972. The cubic root of 27489221 is about 301.8010948480.

The spelling of 27489221 in words is "twenty-seven million, four hundred eighty-nine thousand, two hundred twenty-one".