28268716 has 48 divisors (see below), whose sum is σ = 59076864. Its totient is φ = 11583936.

The previous prime is 28268711. The next prime is 28268731. The reversal of 28268716 is 61786282.

It is not an unprimeable number, because it can be changed into a prime (28268711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63591 + ... + 64033.

It is an arithmetic number, because the mean of its divisors is an integer number (1230768).

Almost surely, 2^28268716 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 28268716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29538432).

28268716 is an abundant number, since it is smaller than the sum of its proper divisors (30808148).

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

28268716 is a wasteful number, since it uses less digits than its factorization.

28268716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 548 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 28268716 is about 5316.8332680271. The cubic root of 28268716 is about 304.6272109387.

The spelling of 28268716 in words is "twenty-eight million, two hundred sixty-eight thousand, seven hundred sixteen".