28045116 has 144 divisors (see below), whose sum is σ = 83411328. Its totient is φ = 8164800.

The previous prime is 28045093. The next prime is 28045141. The reversal of 28045116 is 61154082.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 28045116.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 459726 + ... + 459786.

Almost surely, 2^28045116 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 28045116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41705664).

28045116 is an abundant number, since it is smaller than the sum of its proper divisors (55366212).

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

28045116 is a wasteful number, since it uses less digits than its factorization.

28045116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 28045116 is about 5295.7639675499. The cubic root of 28045116 is about 303.8219034167.

Adding to 28045116 its reverse (61154082), we get a palindrome (89199198).

The spelling of 28045116 in words is "twenty-eight million, forty-five thousand, one hundred sixteen".