28271449 has 8 divisors (see below), whose sum is σ = 29809440. Its totient is φ = 26738496.

The previous prime is 28271447. The next prime is 28271471. The reversal of 28271449 is 94417282.

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 28271449 - 2¹ = 28271447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28271447) 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, 17802 + ... + 19324.

It is an arithmetic number, because the mean of its divisors is an integer number (3726180).

Almost surely, 2^28271449 is an apocalyptic number.

It is an amenable number.

28271449 is a deficient number, since it is larger than the sum of its proper divisors (1537991).

28271449 is a wasteful number, since it uses less digits than its factorization.

28271449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519.

The product of its digits is 32256, while the sum is 37.

The square root of 28271449 is about 5317.0902757053. The cubic root of 28271449 is about 304.6370276720.

The spelling of 28271449 in words is "twenty-eight million, two hundred seventy-one thousand, four hundred forty-nine".