28227616 has 48 divisors (see below), whose sum is σ = 61961760. Its totient is φ = 12579840.

The previous prime is 28227523. The next prime is 28227649. The reversal of 28227616 is 61672282.

It is a Harshad number since it is a multiple of its sum of digits (34).

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 7 ways as a sum of consecutive naturals, for example, 8971 + ... + 11701.

It is an arithmetic number, because the mean of its divisors is an integer number (1290870).

Almost surely, 2^28227616 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 28227616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30980880).

28227616 is an abundant number, since it is smaller than the sum of its proper divisors (33734144).

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

28227616 is a wasteful number, since it uses less digits than its factorization.

28227616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777 (or 2769 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 28227616 is about 5312.9667794934. The cubic root of 28227616 is about 304.4795064234.

Adding to 28227616 its reverse (61672282), we get a palindrome (89899898).

The spelling of 28227616 in words is "twenty-eight million, two hundred twenty-seven thousand, six hundred sixteen".