28133298856 has 48 divisors (see below), whose sum is σ = 57348012960. Its totient is φ = 12932712000.

The previous prime is 28133298811. The next prime is 28133298857. The reversal of 28133298856 is 65889233182.

It is a junction number, because it is equal to n+sod(n) for n = 28133298797 and 28133298806.

It is not an unprimeable number, because it can be changed into a prime (28133298857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 297901 + ... + 380803.

It is an arithmetic number, because the mean of its divisors is an integer number (1194750270).

Almost surely, 2^28133298856 is an apocalyptic number.

28133298856 is a gapful number since it is divisible by the number (26) 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 28133298856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28674006480).

28133298856 is an abundant number, since it is smaller than the sum of its proper divisors (29214714104).

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

28133298856 is a wasteful number, since it uses less digits than its factorization.

28133298856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83186 (or 83169 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 55.

The spelling of 28133298856 in words is "twenty-eight billion, one hundred thirty-three million, two hundred ninety-eight thousand, eight hundred fifty-six".