28243271 has 8 divisors (see below), whose sum is σ = 32511360. Its totient is φ = 24033528.

The previous prime is 28243261. The next prime is 28243283. The reversal of 28243271 is 17234282.

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 28243271 - 2²² = 24048967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28243231) 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, 13541 + ... + 15486.

It is an arithmetic number, because the mean of its divisors is an integer number (4063920).

Almost surely, 2^28243271 is an apocalyptic number.

28243271 is a deficient number, since it is larger than the sum of its proper divisors (4268089).

28243271 is a wasteful number, since it uses less digits than its factorization.

28243271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29173.

The product of its digits is 5376, while the sum is 29.

The square root of 28243271 is about 5314.4398575955. The cubic root of 28243271 is about 304.5357840034.

The spelling of 28243271 in words is "twenty-eight million, two hundred forty-three thousand, two hundred seventy-one".