28268928 has 96 divisors (see below), whose sum is σ = 83060640. Its totient is φ = 9225216.

The previous prime is 28268917. The next prime is 28268951. The reversal of 28268928 is 82986282.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60825 + ... + 61287.

It is an arithmetic number, because the mean of its divisors is an integer number (865215).

Almost surely, 2^28268928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28268928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41530320).

28268928 is an abundant number, since it is smaller than the sum of its proper divisors (54791712).

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

28268928 is a wasteful number, since it uses less digits than its factorization.

28268928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536 (or 521 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 28268928 is about 5316.8532046691. The cubic root of 28268928 is about 304.6279724496.

The spelling of 28268928 in words is "twenty-eight million, two hundred sixty-eight thousand, nine hundred twenty-eight".