28271243 has 32 divisors (see below), whose sum is σ = 38664192. Its totient is φ = 19958400.

The previous prime is 28271239. The next prime is 28271249. The reversal of 28271243 is 34217282.

It is not a de Polignac number, because 28271243 - 2² = 28271239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28271249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60830 + ... + 61292.

It is an arithmetic number, because the mean of its divisors is an integer number (1208256).

Almost surely, 2^28271243 is an apocalyptic number.

28271243 is a deficient number, since it is larger than the sum of its proper divisors (10392949).

28271243 is a wasteful number, since it uses less digits than its factorization.

28271243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555.

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

The square root of 28271243 is about 5317.0709041727. The cubic root of 28271243 is about 304.6362877573.

The spelling of 28271243 in words is "twenty-eight million, two hundred seventy-one thousand, two hundred forty-three".