28847271 has 4 divisors (see below), whose sum is σ = 38463032. Its totient is φ = 19231512.

The previous prime is 28847243. The next prime is 28847279. The reversal of 28847271 is 17274882.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28847271 - 2⁶ = 28847207 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 (28847279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4807876 + ... + 4807881.

It is an arithmetic number, because the mean of its divisors is an integer number (9615758).

Almost surely, 2^28847271 is an apocalyptic number.

28847271 is a deficient number, since it is larger than the sum of its proper divisors (9615761).

28847271 is an equidigital number, since it uses as much as digits as its factorization.

28847271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9615760.

The product of its digits is 50176, while the sum is 39.

The square root of 28847271 is about 5370.9655556520. The cubic root of 28847271 is about 306.6913859774.

The spelling of 28847271 in words is "twenty-eight million, eight hundred forty-seven thousand, two hundred seventy-one".