28271112 has 64 divisors (see below), whose sum is σ = 72705600. Its totient is φ = 9158400.

The previous prime is 28271057. The next prime is 28271137. The reversal of 28271112 is 21117282.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259314 + ... + 259422.

It is an arithmetic number, because the mean of its divisors is an integer number (1136025).

Almost surely, 2^28271112 is an apocalyptic number.

It is an amenable number.

28271112 is an abundant number, since it is smaller than the sum of its proper divisors (44434488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28271112 is a wasteful number, since it uses less digits than its factorization.

28271112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 322 counting only the distinct ones).

The product of its digits is 448, while the sum is 24.

The square root of 28271112 is about 5317.0585853458. The cubic root of 28271112 is about 304.6358172272.

Adding to 28271112 its reverse (21117282), we get a palindrome (49388394).

The spelling of 28271112 in words is "twenty-eight million, two hundred seventy-one thousand, one hundred twelve".