28271568 has 40 divisors (see below), whose sum is σ = 78654688. Its totient is φ = 8698752.

The previous prime is 28271539. The next prime is 28271569. The reversal of 28271568 is 86517282.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28271569) 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, 22030 + ... + 23277.

Almost surely, 2^28271568 is an apocalyptic number.

It is an amenable number.

28271568 is an abundant number, since it is smaller than the sum of its proper divisors (50383120).

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

28271568 is a wasteful number, since it uses less digits than its factorization.

28271568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45331 (or 45325 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 28271568 is about 5317.1014660245. The cubic root of 28271568 is about 304.6374550968.

The spelling of 28271568 in words is "twenty-eight million, two hundred seventy-one thousand, five hundred sixty-eight".