28684040112 has 600 divisors, whose sum is σ = 104974825824. Its totient is φ = 7401259008.

The previous prime is 28684040101. The next prime is 28684040113. The reversal of 28684040112 is 21104048682.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28684040113) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 81257728 + ... + 81258080.

Almost surely, 2^28684040112 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 28684040112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52487412912).

28684040112 is an abundant number, since it is smaller than the sum of its proper divisors (76290785712).

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

28684040112 is a wasteful number, since it uses less digits than its factorization.

28684040112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

Adding to 28684040112 its reverse (21104048682), we get a palindrome (49788088794).

The spelling of 28684040112 in words is "twenty-eight billion, six hundred eighty-four million, forty thousand, one hundred twelve".