28116504 has 256 divisors, whose sum is σ = 96768000. Its totient is φ = 7464960.

The previous prime is 28116467. The next prime is 28116527. The reversal of 28116504 is 40561182.

28116504 is a `hidden beast` number, since 2 + 8 + 1 + 1 + 650 + 4 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 906969 + ... + 906999.

It is an arithmetic number, because the mean of its divisors is an integer number (378000).

Almost surely, 2^28116504 is an apocalyptic number.

28116504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28116504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48384000).

28116504 is an abundant number, since it is smaller than the sum of its proper divisors (68651496).

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

28116504 is a wasteful number, since it uses less digits than its factorization.

28116504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 85 counting only the distinct ones).

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

The square root of 28116504 is about 5302.4997878359. The cubic root of 28116504 is about 304.0794748351.

Adding to 28116504 its reverse (40561182), we get a palindrome (68677686).

The spelling of 28116504 in words is "twenty-eight million, one hundred sixteen thousand, five hundred four".